Move lighting system out of raylib

Lighting is implemented as a raylib example now

examples/shaders_standard_lighting.c

@@ -9,15 +9,79 @@
 *         on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
 *         raylib comes with shaders ready for both versions, check raylib/shaders install folder
 *
-*   This example has been created using raylib 1.3 (www.raylib.com)
+*   This example has been created using raylib 1.7 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2016 Ramon Santamaria (@raysan5)
+*   Copyright (c) 2016-2017 Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 
 #include "raylib.h"
 
+#include <stdlib.h>         // Required for: NULL
+#include <string.h>         // Required for: strcpy()
+#include <math.h>           // Required for: vector math
+
+//----------------------------------------------------------------------------------
+// Defines and Macros
+//----------------------------------------------------------------------------------
+#define MAX_LIGHTS      8   // Max lights supported by standard shader
+
+//----------------------------------------------------------------------------------
+// Types and Structures Definition
+//----------------------------------------------------------------------------------
+
+// Light type
+typedef struct LightData {
+    unsigned int id;        // Light unique id
+    bool enabled;           // Light enabled
+    int type;               // Light type: LIGHT_POINT, LIGHT_DIRECTIONAL, LIGHT_SPOT
+
+    Vector3 position;       // Light position
+    Vector3 target;         // Light direction: LIGHT_DIRECTIONAL and LIGHT_SPOT (cone direction target)
+    float radius;           // Light attenuation radius light intensity reduced with distance (world distance)
+
+    Color diffuse;          // Light diffuse color
+    float intensity;        // Light intensity level
+
+    float coneAngle;        // Light cone max angle: LIGHT_SPOT
+} LightData, *Light;
+
+// Light types
+typedef enum { LIGHT_POINT, LIGHT_DIRECTIONAL, LIGHT_SPOT } LightType;
+
+//----------------------------------------------------------------------------------
+// Global Variables Definition
+//----------------------------------------------------------------------------------
+static Light lights[MAX_LIGHTS];            // Lights pool
+static int lightsCount = 0;                 // Enabled lights counter
+static int lightsLocs[MAX_LIGHTS][8];       // Lights location points in shader: 8 possible points per light: 
+                                            // enabled, type, position, target, radius, diffuse, intensity, coneAngle
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+static Light CreateLight(int type, Vector3 position, Color diffuse); // Create a new light, initialize it and add to pool
+static void DestroyLight(Light light);     // Destroy a light and take it out of the list
+static void DrawLight(Light light);        // Draw light in 3D world
+
+static void GetShaderLightsLocations(Shader shader);    // Get shader locations for lights (up to MAX_LIGHTS)
+static void SetShaderLightsValues(Shader shader);       // Set shader uniform values for lights
+
+// Vector3 math functions
+static float VectorLength(const Vector3 v);             // Calculate vector lenght
+static void VectorNormalize(Vector3 *v);                // Normalize provided vector
+static Vector3 VectorSubtract(Vector3 v1, Vector3 v2);  // Substract two vectors
+
+
+//https://www.gamedev.net/topic/655969-speed-gluniform-vs-uniform-buffer-objects/
+//https://www.reddit.com/r/opengl/comments/4ri20g/is_gluniform_more_expensive_than_glprogramuniform/
+//http://cg.alexandra.dk/?p=3778 - AZDO
+//https://developer.apple.com/library/content/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/BestPracticesforShaders/BestPracticesforShaders.html
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
 int main()
 {
     // Initialization
@@ -39,6 +103,9 @@ int main()
     
     material.shader = LoadShader("resources/shaders/glsl330/standard.vs", "resources/shaders/glsl330/standard.fs");
     
+    // Try to get lights location points (if available)
+    GetShaderLightsLocations(material.shader);
+    
     material.texDiffuse = LoadTexture("resources/model/dwarf_diffuse.png");   // Load model diffuse texture
     material.texNormal = LoadTexture("resources/model/dwarf_normal.png");     // Load model normal texture
     material.texSpecular = LoadTexture("resources/model/dwarf_specular.png"); // Load model specular texture
@@ -65,6 +132,12 @@ int main()
     pointLight->diffuse = (Color){100, 100, 255, 255};
     pointLight->radius = 3.0f;
     
+    // Set shader lights values for enabled lights
+    // NOTE: If values are not changed in real time, they can be set at initialization!!!
+    SetShaderLightsValues(material.shader);
+    
+    //SetShaderActive(0);
+
     // Setup orbital camera
     SetCameraMode(camera, CAMERA_ORBITAL);  // Set an orbital camera mode
 
@@ -115,8 +188,295 @@ int main()
     DestroyLight(dirLight);
     DestroyLight(spotLight);
 
+    // Unload lights
+    if (lightsCount > 0)
+    {
+        for (int i = 0; i < lightsCount; i++) free(lights[i]);
+        lightsCount = 0;
+    }
+
     CloseWindow();              // Close window and OpenGL context
     //--------------------------------------------------------------------------------------
 
     return 0;
 }
+
+//--------------------------------------------------------------------------------------------
+// Module Functions Definitions
+//--------------------------------------------------------------------------------------------
+
+// Create a new light, initialize it and add to pool
+Light CreateLight(int type, Vector3 position, Color diffuse)
+{
+    Light light = NULL;
+    
+    if (lightsCount < MAX_LIGHTS)
+    {
+        // Allocate dynamic memory
+        light = (Light)malloc(sizeof(LightData));
+        
+        // Initialize light values with generic values
+        light->id = lightsCount;
+        light->type = type;
+        light->enabled = true;
+        
+        light->position = position;
+        light->target = (Vector3){ 0.0f, 0.0f, 0.0f };
+        light->intensity = 1.0f;
+        light->diffuse = diffuse;
+        
+        // Add new light to the array
+        lights[lightsCount] = light;
+        
+        // Increase enabled lights count
+        lightsCount++;
+    }
+    else
+    {
+        // NOTE: Returning latest created light to avoid crashes
+        light = lights[lightsCount];
+    }
+
+    return light;
+}
+
+// Destroy a light and take it out of the list
+void DestroyLight(Light light)
+{
+    if (light != NULL)
+    {
+        int lightId = light->id;
+
+        // Free dynamic memory allocation
+        free(lights[lightId]);
+
+        // Remove *obj from the pointers array
+        for (int i = lightId; i < lightsCount; i++)
+        {
+            // Resort all the following pointers of the array
+            if ((i + 1) < lightsCount)
+            {
+                lights[i] = lights[i + 1];
+                lights[i]->id = lights[i + 1]->id;
+            }
+        }
+        
+        // Decrease enabled physic objects count
+        lightsCount--;
+    }
+}
+
+// Draw light in 3D world
+void DrawLight(Light light)
+{
+    switch (light->type)
+    {
+        case LIGHT_POINT:
+        {
+            DrawSphereWires(light->position, 0.3f*light->intensity, 8, 8, (light->enabled ? light->diffuse : GRAY));
+            
+            DrawCircle3D(light->position, light->radius, (Vector3){ 0, 0, 0 }, 0.0f, (light->enabled ? light->diffuse : GRAY));
+            DrawCircle3D(light->position, light->radius, (Vector3){ 1, 0, 0 }, 90.0f, (light->enabled ? light->diffuse : GRAY));
+            DrawCircle3D(light->position, light->radius, (Vector3){ 0, 1, 0 },90.0f, (light->enabled ? light->diffuse : GRAY));
+        } break;
+        case LIGHT_DIRECTIONAL:
+        {
+            DrawLine3D(light->position, light->target, (light->enabled ? light->diffuse : GRAY));
+            
+            DrawSphereWires(light->position, 0.3f*light->intensity, 8, 8, (light->enabled ? light->diffuse : GRAY));
+            DrawCubeWires(light->target, 0.3f, 0.3f, 0.3f, (light->enabled ? light->diffuse : GRAY));
+        } break;
+        case LIGHT_SPOT:
+        {
+            DrawLine3D(light->position, light->target, (light->enabled ? light->diffuse : GRAY));
+            
+            Vector3 dir = VectorSubtract(light->target, light->position);
+            VectorNormalize(&dir);
+            
+            DrawCircle3D(light->position, 0.5f, dir, 0.0f, (light->enabled ? light->diffuse : GRAY));
+            
+            //DrawCylinderWires(light->position, 0.0f, 0.3f*light->coneAngle/50, 0.6f, 5, (light->enabled ? light->diffuse : GRAY));
+            DrawCubeWires(light->target, 0.3f, 0.3f, 0.3f, (light->enabled ? light->diffuse : GRAY));
+        } break;
+        default: break;
+    }
+}
+
+// Get shader locations for lights (up to MAX_LIGHTS)
+static void GetShaderLightsLocations(Shader shader)
+{
+    char locName[32] = "lights[x].\0";
+    char locNameUpdated[64];
+    
+    for (int i = 0; i < MAX_LIGHTS; i++)
+    {
+        locName[7] = '0' + i;
+        
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "enabled\0");
+        lightsLocs[i][0] = GetShaderLocation(shader, locNameUpdated);
+        
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "type\0");
+        lightsLocs[i][1] = GetShaderLocation(shader, locNameUpdated);
+
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "position\0");
+        lightsLocs[i][2] = GetShaderLocation(shader, locNameUpdated);
+        
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "direction\0");
+        lightsLocs[i][3] = GetShaderLocation(shader, locNameUpdated);
+        
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "radius\0");
+        lightsLocs[i][4] = GetShaderLocation(shader, locNameUpdated);
+        
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "diffuse\0");
+        lightsLocs[i][5] = GetShaderLocation(shader, locNameUpdated);
+        
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "intensity\0");
+        lightsLocs[i][6] = GetShaderLocation(shader, locNameUpdated);
+        
+        locNameUpdated[0] = '\0';
+        strcpy(locNameUpdated, locName);
+        strcat(locNameUpdated, "coneAngle\0");
+        lightsLocs[i][7] = GetShaderLocation(shader, locNameUpdated);
+    }
+}
+
+// Set shader uniform values for lights
+// NOTE: It would be far easier with shader UBOs but are not supported on OpenGL ES 2.0
+// TODO: Replace glUniform1i(), glUniform1f(), glUniform3f(), glUniform4f():
+//SetShaderValue(Shader shader, int uniformLoc, float *value, int size)
+//SetShaderValuei(Shader shader, int uniformLoc, int *value, int size)
+static void SetShaderLightsValues(Shader shader)
+{
+    int tempInt[8] = { 0 };
+    float tempFloat[8] = { 0.0f };
+    
+    for (int i = 0; i < MAX_LIGHTS; i++)
+    {
+        if (i < lightsCount)
+        {
+            tempInt[0] = lights[i]->enabled;
+            SetShaderValuei(shader, lightsLocs[i][0], tempInt, 1); //glUniform1i(lightsLocs[i][0], lights[i]->enabled);
+            
+            tempInt[0] = lights[i]->type;
+            SetShaderValuei(shader, lightsLocs[i][1], tempInt, 1); //glUniform1i(lightsLocs[i][1], lights[i]->type);
+            
+            tempFloat[0] = (float)lights[i]->diffuse.r/255.0f;
+            tempFloat[1] = (float)lights[i]->diffuse.g/255.0f;
+            tempFloat[2] = (float)lights[i]->diffuse.b/255.0f;
+            tempFloat[3] = (float)lights[i]->diffuse.a/255.0f;
+            SetShaderValue(shader, lightsLocs[i][5], tempFloat, 4);
+            //glUniform4f(lightsLocs[i][5], (float)lights[i]->diffuse.r/255, (float)lights[i]->diffuse.g/255, (float)lights[i]->diffuse.b/255, (float)lights[i]->diffuse.a/255);
+            
+            tempFloat[0] = lights[i]->intensity;
+            SetShaderValue(shader, lightsLocs[i][6], tempFloat, 1);
+            
+            switch (lights[i]->type)
+            {
+                case LIGHT_POINT:
+                {
+                    tempFloat[0] = lights[i]->position.x;
+                    tempFloat[1] = lights[i]->position.y;
+                    tempFloat[2] = lights[i]->position.z;
+                    SetShaderValue(shader, lightsLocs[i][2], tempFloat, 3);
+
+                    tempFloat[0] = lights[i]->radius;
+                    SetShaderValue(shader, lightsLocs[i][4], tempFloat, 1);
+            
+                    //glUniform3f(lightsLocs[i][2], lights[i]->position.x, lights[i]->position.y, lights[i]->position.z);
+                    //glUniform1f(lightsLocs[i][4], lights[i]->radius);
+                } break;
+                case LIGHT_DIRECTIONAL:
+                {
+                    Vector3 direction = VectorSubtract(lights[i]->target, lights[i]->position);
+                    VectorNormalize(&direction);
+                    
+                    tempFloat[0] = direction.x;
+                    tempFloat[1] = direction.y;
+                    tempFloat[2] = direction.z;
+                    SetShaderValue(shader, lightsLocs[i][3], tempFloat, 3);
+                    
+                    //glUniform3f(lightsLocs[i][3], direction.x, direction.y, direction.z);
+                } break;
+                case LIGHT_SPOT:
+                {
+                    tempFloat[0] = lights[i]->position.x;
+                    tempFloat[1] = lights[i]->position.y;
+                    tempFloat[2] = lights[i]->position.z;
+                    SetShaderValue(shader, lightsLocs[i][2], tempFloat, 3);
+                    
+                    //glUniform3f(lightsLocs[i][2], lights[i]->position.x, lights[i]->position.y, lights[i]->position.z);
+                    
+                    Vector3 direction = VectorSubtract(lights[i]->target, lights[i]->position);
+                    VectorNormalize(&direction);
+                    
+                    tempFloat[0] = direction.x;
+                    tempFloat[1] = direction.y;
+                    tempFloat[2] = direction.z;
+                    SetShaderValue(shader, lightsLocs[i][3], tempFloat, 3);
+                    //glUniform3f(lightsLocs[i][3], direction.x, direction.y, direction.z);
+                    
+                    tempFloat[0] = lights[i]->coneAngle;
+                    SetShaderValue(shader, lightsLocs[i][7], tempFloat, 1);
+                    //glUniform1f(lightsLocs[i][7], lights[i]->coneAngle);
+                } break;
+                default: break;
+            }
+        }
+        else
+        {
+            tempInt[0] = 0;
+            SetShaderValuei(shader, lightsLocs[i][0], tempInt, 1); //glUniform1i(lightsLocs[i][0], 0);   // Light disabled
+        }
+    }
+}
+
+// Calculate vector lenght
+float VectorLength(const Vector3 v)
+{
+    float length;
+
+    length = sqrtf(v.x*v.x + v.y*v.y + v.z*v.z);
+
+    return length;
+}
+
+// Normalize provided vector
+void VectorNormalize(Vector3 *v)
+{
+    float length, ilength;
+
+    length = VectorLength(*v);
+
+    if (length == 0.0f) length = 1.0f;
+
+    ilength = 1.0f/length;
+
+    v->x *= ilength;
+    v->y *= ilength;
+    v->z *= ilength;
+}
+
+// Substract two vectors
+Vector3 VectorSubtract(Vector3 v1, Vector3 v2)
+{
+    Vector3 result;
+
+    result.x = v1.x - v2.x;
+    result.y = v1.y - v2.y;
+    result.z = v1.z - v2.z;
+
+    return result;
+}

src/models.c

@@ -574,43 +574,6 @@ void DrawGizmo(Vector3 position)
     rlPopMatrix();
 }
 
-
-// Draw light in 3D world
-void DrawLight(Light light)
-{
-    switch (light->type)
-    {
-        case LIGHT_POINT:
-        {
-            DrawSphereWires(light->position, 0.3f*light->intensity, 8, 8, (light->enabled ? light->diffuse : GRAY));
-            
-            DrawCircle3D(light->position, light->radius, (Vector3){ 0, 0, 0 }, 0.0f, (light->enabled ? light->diffuse : GRAY));
-            DrawCircle3D(light->position, light->radius, (Vector3){ 1, 0, 0 }, 90.0f, (light->enabled ? light->diffuse : GRAY));
-            DrawCircle3D(light->position, light->radius, (Vector3){ 0, 1, 0 },90.0f, (light->enabled ? light->diffuse : GRAY));
-        } break;
-        case LIGHT_DIRECTIONAL:
-        {
-            DrawLine3D(light->position, light->target, (light->enabled ? light->diffuse : GRAY));
-            
-            DrawSphereWires(light->position, 0.3f*light->intensity, 8, 8, (light->enabled ? light->diffuse : GRAY));
-            DrawCubeWires(light->target, 0.3f, 0.3f, 0.3f, (light->enabled ? light->diffuse : GRAY));
-        } break;
-        case LIGHT_SPOT:
-        {
-            DrawLine3D(light->position, light->target, (light->enabled ? light->diffuse : GRAY));
-            
-            Vector3 dir = VectorSubtract(light->target, light->position);
-            VectorNormalize(&dir);
-            
-            DrawCircle3D(light->position, 0.5f, dir, 0.0f, (light->enabled ? light->diffuse : GRAY));
-            
-            //DrawCylinderWires(light->position, 0.0f, 0.3f*light->coneAngle/50, 0.6f, 5, (light->enabled ? light->diffuse : GRAY));
-            DrawCubeWires(light->target, 0.3f, 0.3f, 0.3f, (light->enabled ? light->diffuse : GRAY));
-        } break;
-        default: break;
-    }
-}
-
 // Load mesh from file
 Mesh LoadMesh(const char *fileName)
 {
@@ -751,17 +714,6 @@ Material LoadDefaultMaterial(void)
     return material;
 }
 
-// Load standard material (uses material attributes and lighting shader)
-// NOTE: Standard shader supports multiple maps and lights
-Material LoadStandardMaterial(void)
-{
-    Material material = LoadDefaultMaterial();
-
-    material.shader = GetStandardShader();
-
-    return material;
-}
-
 // Unload material from memory
 void UnloadMaterial(Material material)
 {

src/raylib.h

@@ -12,7 +12,6 @@
 *     Powerful fonts module with SpriteFonts support (XNA bitmap fonts, AngelCode fonts, TTF)
 *     Multiple textures support, including compressed formats and mipmaps generation
 *     Basic 3d support for Shapes, Models, Billboards, Heightmaps and Cubicmaps
-*     Materials (diffuse, normal, specular) and Lighting (point, directional, spot) support
 *     Powerful math module for Vector, Matrix and Quaternion operations: [raymath]
 *     Audio loading and playing with streaming support and mixing channels [audio]
 *     VR stereo rendering support with configurable HMD device parameters
@@ -466,25 +465,6 @@ typedef struct Model {
     Material material;      // Shader and textures data
 } Model;
 
-// Light type
-typedef struct LightData {
-    unsigned int id;        // Light unique id
-    bool enabled;           // Light enabled
-    int type;               // Light type: LIGHT_POINT, LIGHT_DIRECTIONAL, LIGHT_SPOT
-
-    Vector3 position;       // Light position
-    Vector3 target;         // Light direction: LIGHT_DIRECTIONAL and LIGHT_SPOT (cone direction target)
-    float radius;           // Light attenuation radius light intensity reduced with distance (world distance)
-
-    Color diffuse;          // Light diffuse color
-    float intensity;        // Light intensity level
-
-    float coneAngle;        // Light cone max angle: LIGHT_SPOT
-} LightData, *Light;
-
-// Light types
-typedef enum { LIGHT_POINT, LIGHT_DIRECTIONAL, LIGHT_SPOT } LightType;
-
 // Ray type (useful for raycast)
 typedef struct Ray {
     Vector3 position;       // Ray position (origin)
@@ -876,7 +856,6 @@ RLAPI void DrawPlane(Vector3 centerPos, Vector2 size, Color color);
 RLAPI void DrawRay(Ray ray, Color color);                                                                // Draw a ray line
 RLAPI void DrawGrid(int slices, float spacing);                                                          // Draw a grid (centered at (0, 0, 0))
 RLAPI void DrawGizmo(Vector3 position);                                                                  // Draw simple gizmo
-RLAPI void DrawLight(Light light);                                                                       // Draw light in 3D world
 //DrawTorus(), DrawTeapot() could be useful?
 
 //------------------------------------------------------------------------------------
@@ -894,7 +873,6 @@ RLAPI void UnloadModel(Model model);
 RLAPI Material LoadMaterial(const char *fileName);                                                      // Load material from file
 RLAPI Material LoadMaterialEx(Shader shader, Texture2D diffuse, Color color);                           // Load material from basic shading data
 RLAPI Material LoadDefaultMaterial(void);                                                               // Load default material (uses default models shader)
-RLAPI Material LoadStandardMaterial(void);                                                              // Load standard material (uses material attributes and lighting shader)
 RLAPI void UnloadMaterial(Material material);                                                           // Unload material from GPU memory (VRAM)
 
 RLAPI void DrawModel(Model model, Vector3 position, float scale, Color tint);                           // Draw a model (with texture if set)
@@ -930,7 +908,6 @@ RLAPI Shader LoadShader(char *vsFileName, char *fsFileName);              // Loa
 RLAPI void UnloadShader(Shader shader);                                   // Unload shader from GPU memory (VRAM)
 
 RLAPI Shader GetDefaultShader(void);                                      // Get default shader
-RLAPI Shader GetStandardShader(void);                                     // Get standard shader
 RLAPI Texture2D GetDefaultTexture(void);                                  // Get default texture
 
 RLAPI int GetShaderLocation(Shader shader, const char *uniformName);              // Get shader uniform location
@@ -946,9 +923,6 @@ RLAPI void EndShaderMode(void);                                           // End
 RLAPI void BeginBlendMode(int mode);                                      // Begin blending mode (alpha, additive, multiplied)
 RLAPI void EndBlendMode(void);                                            // End blending mode (reset to default: alpha blending)
 
-RLAPI Light CreateLight(int type, Vector3 position, Color diffuse);       // Create a new light, initialize it and add to pool
-RLAPI void DestroyLight(Light light);                                     // Destroy a light and take it out of the list
-
 //------------------------------------------------------------------------------------
 // VR experience Functions (Module: rlgl)
 // NOTE: This functions are useless when using OpenGL 1.1

src/rlgl.c

@@ -22,7 +22,6 @@
 *       GRAPHICS_API_OPENGL_ES2 - Use OpenGL ES 2.0 backend
 *
 *       RLGL_STANDALONE             - Use rlgl as standalone library (no raylib dependency)
-*       RLGL_NO_STANDARD_SHADER     - Avoid standard shader (shader_standard.h) inclusion
 *       RLGL_NO_DISTORTION_SHADER   - Avoid stereo rendering distortion sahder (shader_distortion.h) inclusion
 *       RLGL_OCULUS_SUPPORT         - Enable Oculus Rift CV1 functionality
 *
@@ -92,10 +91,6 @@
     #include <stdarg.h>             // Required for: va_list, va_start(), vfprintf(), va_end() [Used only on TraceLog()]
 #endif
 
-#if !defined(GRAPHICS_API_OPENGL_11) && !defined(RLGL_NO_STANDARD_SHADER)
-    #include "shader_standard.h"    // Standard shader to be embedded
-#endif
-
 #if !defined(GRAPHICS_API_OPENGL_11) && !defined(RLGL_NO_DISTORTION_SHADER)
     #include "shader_distortion.h"  // Distortion shader to be embedded
 #endif
@@ -119,8 +114,6 @@
 #define TEMP_VERTEX_BUFFER_SIZE  4096   // Temporal Vertex Buffer (required for vertex-transformations)
                                         // NOTE: Every vertex are 3 floats (12 bytes)
 
-#define MAX_LIGHTS                  8   // Max lights supported by standard shader
-
 #ifndef GL_SHADING_LANGUAGE_VERSION
     #define GL_SHADING_LANGUAGE_VERSION         0x8B8C
 #endif
@@ -305,10 +298,7 @@ static bool useTempBuffer = false;
 
 // Shader Programs
 static Shader defaultShader;                // Basic shader, support vertex color and diffuse texture
-static Shader standardShader;               // Shader with support for lighting and materials
-                                            // NOTE: Lazy initialization when GetStandardShader()
 static Shader currentShader;                // Shader to be used on rendering (by default, defaultShader)
-static bool standardShaderLoaded = false;   // Flag to track if standard shader has been loaded
 
 // Extension supported flag: VAO
 static bool vaoSupported = false;           // VAO support (OpenGL ES2 could not support VAO extension)
@@ -368,12 +358,6 @@ static unsigned int whiteTexture;
 static int screenWidth;     // Default framebuffer width
 static int screenHeight;    // Default framebuffer height
 
-// Lighting data
-static Light lights[MAX_LIGHTS];            // Lights pool
-static int lightsCount = 0;                 // Enabled lights counter
-static int lightsLocs[MAX_LIGHTS][8];       // Lights location points in shader: 8 possible points per light: 
-                                            // enabled, type, position, target, radius, diffuse, intensity, coneAngle
-
 //----------------------------------------------------------------------------------
 // Module specific Functions Declaration
 //----------------------------------------------------------------------------------
@@ -382,10 +366,8 @@ static void LoadCompressedTexture(unsigned char *data, int width, int height, in
 static unsigned int LoadShaderProgram(const char *vShaderStr, const char *fShaderStr);  // Load custom shader strings and return program id
 
 static Shader LoadDefaultShader(void);      // Load default shader (just vertex positioning and texture coloring)
-static Shader LoadStandardShader(void);     // Load standard shader (support materials and lighting)
 static void LoadDefaultShaderLocations(Shader *shader); // Bind default shader locations (attributes and uniforms)
 static void UnloadDefaultShader(void);      // Unload default shader
-static void UnloadStandardShader(void);     // Unload standard shader
 
 static void LoadDefaultBuffers(void);       // Load default internal buffers (lines, triangles, quads)
 static void UpdateDefaultBuffers(void);     // Update default internal buffers (VAOs/VBOs) with vertex data
@@ -397,9 +379,6 @@ static void SetStereoConfig(VrDeviceInfo info);
 
 // Set internal projection and modelview matrix depending on eyes tracking data
 static void SetStereoView(int eye, Matrix matProjection, Matrix matModelView);
-
-static void GetShaderLightsLocations(Shader shader);    // Get shader locations for lights (up to MAX_LIGHTS)
-static void SetShaderLightsValues(Shader shader);       // Set shader uniform values for lights
 #endif
 
 #if defined(RLGL_OCULUS_SUPPORT)
@@ -1328,20 +1307,12 @@ void rlglClose(void)
 {
 #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
     UnloadDefaultShader();
-    UnloadStandardShader();
     UnloadDefaultBuffers();
     
     // Delete default white texture
     glDeleteTextures(1, &whiteTexture);
     TraceLog(INFO, "[TEX ID %i] Unloaded texture data (base white texture) from VRAM", whiteTexture);
 
-    // Unload lights
-    if (lightsCount > 0)
-    {
-        for (int i = 0; i < lightsCount; i++) free(lights[i]);
-        lightsCount = 0;
-    }
-
     free(draws);
 #endif
 }
@@ -2003,8 +1974,6 @@ void rlglDrawMesh(Mesh mesh, Material material, Matrix transform)
     if (mesh.normals != NULL) glNormalPointer(GL_FLOAT, 0, mesh.normals);           // Pointer to normals array
     if (mesh.colors != NULL) glColorPointer(4, GL_UNSIGNED_BYTE, 0, mesh.colors);   // Pointer to colors array
     
-    // TODO: Support OpenGL 1.1 lighting system
-
     rlPushMatrix();
         rlMultMatrixf(MatrixToFloat(transform));
         rlColor4ub(material.colDiffuse.r, material.colDiffuse.g, material.colDiffuse.b, material.colDiffuse.a);
@@ -2070,10 +2039,6 @@ void rlglDrawMesh(Mesh mesh, Material material, Matrix transform)
         // Check if glossiness is located in shader and upload value
         int glossinessLoc = glGetUniformLocation(material.shader.id, "glossiness");
         if (glossinessLoc != -1) glUniform1f(glossinessLoc, material.glossiness);
-
-        // Set shader lights values for enabled lights
-        // NOTE: Lights array location points are obtained on shader loading (if available)
-        if (lightsCount > 0) SetShaderLightsValues(material.shader);
     }    
 
     // Set shader textures (diffuse, normal, specular)
@@ -2528,25 +2493,6 @@ Shader GetDefaultShader(void)
 #endif
 }
 
-// Get default shader
-// NOTE: Inits global variable standardShader
-Shader GetStandardShader(void)
-{
-    Shader shader = { 0 };
-
-#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
-    if (standardShaderLoaded) shader = standardShader;
-    else
-    {
-        // Lazy initialization of standard shader
-        standardShader = LoadStandardShader();
-        shader = standardShader;
-    }
-#endif
-
-    return shader;
-}
-
 // Get shader uniform location
 int GetShaderLocation(Shader shader, const char *uniformName)
 {
@@ -2571,7 +2517,7 @@ void SetShaderValue(Shader shader, int uniformLoc, float *value, int size)
     else if (size == 4) glUniform4fv(uniformLoc, 1, value);     // Shader uniform type: vec4
     else TraceLog(WARNING, "Shader value float array size not supported");
     
-    glUseProgram(0);
+    //glUseProgram(0);      // Avoid reseting current shader program, in case other uniforms are set
 #endif
 }
 
@@ -2587,7 +2533,7 @@ void SetShaderValuei(Shader shader, int uniformLoc, int *value, int size)
     else if (size == 4) glUniform4iv(uniformLoc, 1, value);     // Shader uniform type: ivec4
     else TraceLog(WARNING, "Shader value int array size not supported");
     
-    glUseProgram(0);
+    //glUseProgram(0);
 #endif
 }
 
@@ -2599,7 +2545,7 @@ void SetShaderValueMatrix(Shader shader, int uniformLoc, Matrix mat)
 
     glUniformMatrix4fv(uniformLoc, 1, false, MatrixToFloat(mat));
     
-    glUseProgram(0);
+    //glUseProgram(0);
 #endif
 }
 
@@ -2645,73 +2591,6 @@ void EndBlendMode(void)
     BeginBlendMode(BLEND_ALPHA);
 }
 
-// Create a new light, initialize it and add to pool
-Light CreateLight(int type, Vector3 position, Color diffuse)
-{
-    Light light = NULL;
-    
-    if (lightsCount < MAX_LIGHTS)
-    {
-        // Allocate dynamic memory
-        light = (Light)malloc(sizeof(LightData));
-        
-        // Initialize light values with generic values
-        light->id = lightsCount;
-        light->type = type;
-        light->enabled = true;
-        
-        light->position = position;
-        light->target = (Vector3){ 0.0f, 0.0f, 0.0f };
-        light->intensity = 1.0f;
-        light->diffuse = diffuse;
-        
-        // Add new light to the array
-        lights[lightsCount] = light;
-        
-        // Increase enabled lights count
-        lightsCount++;
-    }
-    else
-    {
-        TraceLog(WARNING, "Too many lights, only supported up to %i lights", MAX_LIGHTS);
-        
-        // NOTE: Returning latest created light to avoid crashes
-        light = lights[lightsCount];
-    }
-
-#if defined(GRAPHICS_API_OPENGL_11)
-    TraceLog(WARNING, "Lighting currently not supported on OpenGL 1.1");
-#endif
-
-    return light;
-}
-
-// Destroy a light and take it out of the list
-void DestroyLight(Light light)
-{
-    if (light != NULL)
-    {
-        int lightId = light->id;
-
-        // Free dynamic memory allocation
-        free(lights[lightId]);
-
-        // Remove *obj from the pointers array
-        for (int i = lightId; i < lightsCount; i++)
-        {
-            // Resort all the following pointers of the array
-            if ((i + 1) < lightsCount)
-            {
-                lights[i] = lights[i + 1];
-                lights[i]->id = lights[i + 1]->id;
-            }
-        }
-        
-        // Decrease enabled physic objects count
-        lightsCount--;
-    }
-}
-
 // Init VR device (or simulator)
 // NOTE: If device is not available, it fallbacks to default device (simulator)
 // NOTE: It modifies the global variable: VrDeviceInfo hmd
@@ -3209,39 +3088,6 @@ static Shader LoadDefaultShader(void)
     return shader;
 }
 
-// Load standard shader
-// NOTE: This shader supports: 
-//     - Up to 3 different maps: diffuse, normal, specular
-//     - Material properties: colAmbient, colDiffuse, colSpecular, glossiness
-//     - Up to 8 lights: Point, Directional or Spot
-static Shader LoadStandardShader(void)
-{
-    Shader shader;
-    
-#if !defined(RLGL_NO_STANDARD_SHADER)
-    // Load standard shader (embeded in standard_shader.h)
-    shader.id = LoadShaderProgram(vStandardShaderStr, fStandardShaderStr);
-
-    if (shader.id != 0)
-    {
-        LoadDefaultShaderLocations(&shader);
-        TraceLog(INFO, "[SHDR ID %i] Standard shader loaded successfully", shader.id);
-        
-        standardShaderLoaded = true;
-    }
-    else
-    {
-        TraceLog(WARNING, "[SHDR ID %i] Standard shader could not be loaded, using default shader", shader.id);
-        shader = GetDefaultShader();
-    }
-#else
-    shader = GetDefaultShader();
-    TraceLog(WARNING, "[SHDR ID %i] Standard shader not available, using default shader", shader.id);
-#endif
-
-    return shader;
-}
-
 // Get location handlers to for shader attributes and uniforms
 // NOTE: If any location is not found, loc point becomes -1
 static void LoadDefaultShaderLocations(Shader *shader)
@@ -3275,9 +3121,6 @@ static void LoadDefaultShaderLocations(Shader *shader)
     shader->mapTexture2Loc = glGetUniformLocation(shader->id, "texture2");
     
     // TODO: Try to find all expected/recognized shader locations (predefined names, must be documented)
-    
-    // Try to get lights location points (if available)
-    GetShaderLightsLocations(*shader);
 }
 
 // Unload default shader 
@@ -3292,20 +3135,6 @@ static void UnloadDefaultShader(void)
     glDeleteProgram(defaultShader.id);
 }
 
-// Unload standard shader 
-static void UnloadStandardShader(void)
-{
-    glUseProgram(0);
-#if !defined(RLGL_NO_STANDARD_SHADER)
-    //glDetachShader(defaultShader, vertexShader);
-    //glDetachShader(defaultShader, fragmentShader);
-    //glDeleteShader(vertexShader);     // Already deleted on shader compilation
-    //glDeleteShader(fragmentShader);   // Already deleted on shader compilation
-    glDeleteProgram(standardShader.id);
-#endif
-}
-
-
 // Load default internal buffers (lines, triangles, quads)
 static void LoadDefaultBuffers(void)
 {
@@ -3763,104 +3592,6 @@ static void UnloadDefaultBuffers(void)
     free(quads.indices);
 }
 
-// Get shader locations for lights (up to MAX_LIGHTS)
-static void GetShaderLightsLocations(Shader shader)
-{
-    char locName[32] = "lights[x].\0";
-    char locNameUpdated[64];
-    
-    for (int i = 0; i < MAX_LIGHTS; i++)
-    {
-        locName[7] = '0' + i;
-        
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "enabled\0");
-        lightsLocs[i][0] = glGetUniformLocation(shader.id, locNameUpdated);
-        
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "type\0");
-        lightsLocs[i][1] = glGetUniformLocation(shader.id, locNameUpdated);
-
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "position\0");
-        lightsLocs[i][2] = glGetUniformLocation(shader.id, locNameUpdated);
-        
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "direction\0");
-        lightsLocs[i][3] = glGetUniformLocation(shader.id, locNameUpdated);
-        
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "radius\0");
-        lightsLocs[i][4] = glGetUniformLocation(shader.id, locNameUpdated);
-        
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "diffuse\0");
-        lightsLocs[i][5] = glGetUniformLocation(shader.id, locNameUpdated);
-        
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "intensity\0");
-        lightsLocs[i][6] = glGetUniformLocation(shader.id, locNameUpdated);
-        
-        locNameUpdated[0] = '\0';
-        strcpy(locNameUpdated, locName);
-        strcat(locNameUpdated, "coneAngle\0");
-        lightsLocs[i][7] = glGetUniformLocation(shader.id, locNameUpdated);
-    }
-}
-
-// Set shader uniform values for lights
-// NOTE: It would be far easier with shader UBOs but are not supported on OpenGL ES 2.0
-static void SetShaderLightsValues(Shader shader)
-{
-    for (int i = 0; i < MAX_LIGHTS; i++)
-    {
-        if (i < lightsCount)
-        {
-            glUniform1i(lightsLocs[i][0], lights[i]->enabled);
-
-            glUniform1i(lightsLocs[i][1], lights[i]->type);
-            glUniform4f(lightsLocs[i][5], (float)lights[i]->diffuse.r/255, (float)lights[i]->diffuse.g/255, (float)lights[i]->diffuse.b/255, (float)lights[i]->diffuse.a/255);
-            glUniform1f(lightsLocs[i][6], lights[i]->intensity);
-            
-            switch (lights[i]->type)
-            {
-                case LIGHT_POINT:
-                {
-                    glUniform3f(lightsLocs[i][2], lights[i]->position.x, lights[i]->position.y, lights[i]->position.z);
-                    glUniform1f(lightsLocs[i][4], lights[i]->radius);
-                } break;
-                case LIGHT_DIRECTIONAL:
-                {
-                    Vector3 direction = VectorSubtract(lights[i]->target, lights[i]->position);
-                    VectorNormalize(&direction);
-                    glUniform3f(lightsLocs[i][3], direction.x, direction.y, direction.z);
-                } break;
-                case LIGHT_SPOT:
-                {
-                    glUniform3f(lightsLocs[i][2], lights[i]->position.x, lights[i]->position.y, lights[i]->position.z);
-                    
-                    Vector3 direction = VectorSubtract(lights[i]->target, lights[i]->position);
-                    VectorNormalize(&direction);
-                    glUniform3f(lightsLocs[i][3], direction.x, direction.y, direction.z);
-                    
-                    glUniform1f(lightsLocs[i][7], lights[i]->coneAngle);
-                } break;
-                default: break;
-            }
-        }
-        else
-        {
-            glUniform1i(lightsLocs[i][0], 0);   // Light disabled
-        }
-    }
-}
-
 // Configure stereo rendering (including distortion shader) with HMD device parameters
 static void SetStereoConfig(VrDeviceInfo hmd)
 {

src/shader_standard.h

@@ -1,173 +0,0 @@
-
-// Vertex shader definition to embed, no external file required
-static const char vStandardShaderStr[] = 
-#if defined(GRAPHICS_API_OPENGL_21)
-"#version 120                       \n"
-#elif defined(GRAPHICS_API_OPENGL_ES2)
-"#version 100                       \n"
-#endif
-#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"attribute vec3 vertexPosition;     \n"
-"attribute vec3 vertexNormal;       \n"
-"attribute vec2 vertexTexCoord;     \n"
-"attribute vec4 vertexColor;        \n"
-"varying vec3 fragPosition;         \n"
-"varying vec3 fragNormal;           \n"
-"varying vec2 fragTexCoord;         \n"
-"varying vec4 fragColor;            \n"
-#elif defined(GRAPHICS_API_OPENGL_33)
-"#version 330                       \n"
-"in vec3 vertexPosition;            \n"
-"in vec3 vertexNormal;              \n"
-"in vec2 vertexTexCoord;            \n"
-"in vec4 vertexColor;               \n"
-"out vec3 fragPosition;             \n"
-"out vec3 fragNormal;               \n"
-"out vec2 fragTexCoord;             \n"
-"out vec4 fragColor;                \n"
-#endif
-"uniform mat4 mvpMatrix;            \n"
-"void main()                        \n"
-"{                                  \n"
-"    fragPosition = vertexPosition; \n"
-"    fragNormal = vertexNormal;     \n"
-"    fragTexCoord = vertexTexCoord; \n"
-"    fragColor = vertexColor;       \n"
-"    gl_Position = mvpMatrix*vec4(vertexPosition, 1.0); \n"
-"}                                  \n";
-
-// Fragment shader definition to embed, no external file required
-static const char fStandardShaderStr[] = 
-#if defined(GRAPHICS_API_OPENGL_21)
-"#version 120                       \n"
-#elif defined(GRAPHICS_API_OPENGL_ES2)
-"#version 100                       \n"
-"precision mediump float;           \n"     // precision required for OpenGL ES2 (WebGL)
-#endif
-#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"varying vec3 fragPosition;         \n"
-"varying vec3 fragNormal;           \n"
-"varying vec2 fragTexCoord;         \n"
-"varying vec4 fragColor;            \n"
-#elif defined(GRAPHICS_API_OPENGL_33)
-"#version 330                       \n"
-"in vec3 fragPosition;              \n"
-"in vec3 fragNormal;                \n"
-"in vec2 fragTexCoord;              \n"
-"in vec4 fragColor;                 \n"
-"out vec4 finalColor;               \n"
-#endif
-"uniform sampler2D texture0;        \n"
-"uniform sampler2D texture1;        \n"
-"uniform sampler2D texture2;        \n"
-"uniform vec4 colAmbient;           \n"
-"uniform vec4 colDiffuse;           \n"
-"uniform vec4 colSpecular;          \n"
-"uniform float glossiness;          \n"
-"uniform int useNormal;             \n"
-"uniform int useSpecular;           \n"
-"uniform mat4 modelMatrix;          \n"
-"uniform vec3 viewDir;              \n"
-"struct Light {                     \n"
-"    int enabled;                   \n"
-"    int type;                      \n"
-"    vec3 position;                 \n"
-"    vec3 direction;                \n"
-"    vec4 diffuse;                  \n"
-"    float intensity;               \n"
-"    float radius;                  \n"
-"    float coneAngle; };            \n"
-"const int maxLights = 8;           \n"
-"uniform Light lights[maxLights];   \n"
-"\n"  
-"vec3 CalcPointLight(Light l, vec3 n, vec3 v, float s)   \n"
-"{\n"
-"    vec3 surfacePos = vec3(modelMatrix*vec4(fragPosition, 1));\n"
-"    vec3 surfaceToLight = l.position - surfacePos;\n"
-"    float brightness = clamp(float(dot(n, surfaceToLight)/(length(surfaceToLight)*length(n))), 0.0, 1.0);\n"
-"    float diff = 1.0/dot(surfaceToLight/l.radius, surfaceToLight/l.radius)*brightness*l.intensity;\n"
-"    float spec = 0.0;\n"
-"    if (diff > 0.0)\n"
-"    {\n"
-"        vec3 h = normalize(-l.direction + v);\n"
-"        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;\n"
-"    }\n"
-"    return (diff*l.diffuse.rgb + spec*colSpecular.rgb);\n"
-"}\n"
-"\n"
-"vec3 CalcDirectionalLight(Light l, vec3 n, vec3 v, float s)\n"
-"{\n"
-"    vec3 lightDir = normalize(-l.direction);\n"
-"    float diff = clamp(float(dot(n, lightDir)), 0.0, 1.0)*l.intensity;\n"
-"    float spec = 0.0;\n"
-"    if (diff > 0.0)\n"
-"    {\n"
-"        vec3 h = normalize(lightDir + v);\n"
-"        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;\n"
-"    }\n"
-"    return (diff*l.intensity*l.diffuse.rgb + spec*colSpecular.rgb);\n"
-"}\n"
-"\n"
-"vec3 CalcSpotLight(Light l, vec3 n, vec3 v, float s)\n"
-"{\n"
-"    vec3 surfacePos = vec3(modelMatrix*vec4(fragPosition, 1.0));\n"
-"    vec3 lightToSurface = normalize(surfacePos - l.position);\n"
-"    vec3 lightDir = normalize(-l.direction);\n"
-"    float diff = clamp(float(dot(n, lightDir)), 0.0, 1.0)*l.intensity;\n"
-"    float attenuation = clamp(float(dot(n, lightToSurface)), 0.0, 1.0);\n"
-"    attenuation = dot(lightToSurface, -lightDir);\n"
-"    float lightToSurfaceAngle = degrees(acos(attenuation));\n"
-"    if (lightToSurfaceAngle > l.coneAngle) attenuation = 0.0;\n"
-"    float falloff = (l.coneAngle - lightToSurfaceAngle)/l.coneAngle;\n"
-"    float diffAttenuation = diff*attenuation;\n"
-"    float spec = 0.0;\n"
-"    if (diffAttenuation > 0.0)\n"
-"    {\n"
-"        vec3 h = normalize(lightDir + v);\n"
-"        spec = pow(abs(dot(n, h)), 3.0 + glossiness)*s;\n"
-"    }\n"
-"    return (falloff*(diffAttenuation*l.diffuse.rgb + spec*colSpecular.rgb));\n"
-"}\n"
-"\n"
-"void main()\n"
-"{\n"
-"    mat3 normalMatrix = mat3(modelMatrix);\n"
-"    vec3 normal = normalize(normalMatrix*fragNormal);\n"
-"    vec3 n = normalize(normal);\n"
-"    vec3 v = normalize(viewDir);\n"
-#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"    vec4 texelColor = texture2D(texture0, fragTexCoord);\n"
-#elif defined(GRAPHICS_API_OPENGL_33)
-"    vec4 texelColor = texture(texture0, fragTexCoord);\n"
-#endif
-"    vec3 lighting = colAmbient.rgb;\n"
-"    if (useNormal == 1)\n"
-"    {\n"
-#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"        n *= texture2D(texture1, fragTexCoord).rgb;\n"
-#elif defined(GRAPHICS_API_OPENGL_33)
-"        n *= texture(texture1, fragTexCoord).rgb;\n"
-#endif
-"        n = normalize(n);\n"
-"    }\n"
-"    float spec = 1.0;\n"
-#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"    if (useSpecular == 1) spec = texture2D(texture2, fragTexCoord).r;\n"
-#elif defined(GRAPHICS_API_OPENGL_33)
-"    if (useSpecular == 1) spec = texture(texture2, fragTexCoord).r;\n"
-#endif
-"    for (int i = 0; i < maxLights; i++)\n"
-"    {\n"
-"        if (lights[i].enabled == 1)\n"
-"        {\n"
-"            if(lights[i].type == 0) lighting += CalcPointLight(lights[i], n, v, spec);\n"
-"            else if(lights[i].type == 1) lighting += CalcDirectionalLight(lights[i], n, v, spec);\n"
-"            else if(lights[i].type == 2) lighting += CalcSpotLight(lights[i], n, v, spec);\n"
-"        }\n"
-"    }\n"
-#if defined(GRAPHICS_API_OPENGL_ES2) || defined(GRAPHICS_API_OPENGL_21)
-"   gl_FragColor = vec4(texelColor.rgb*lighting*colDiffuse.rgb, texelColor.a*colDiffuse.a); \n"
-#elif defined(GRAPHICS_API_OPENGL_33)
-"   finalColor = vec4(texelColor.rgb*lighting*colDiffuse.rgb, texelColor.a*colDiffuse.a); \n"
-#endif
-"}\n";