REVIEWED: DrawMesh() #2511

Disable color vertex attribute if not provided by mesh

examples/shaders/resources/shaders/glsl330/lighting.fs

@@ -3,7 +3,7 @@
 // Input vertex attributes (from vertex shader)
 in vec3 fragPosition;
 in vec2 fragTexCoord;
-in vec4 fragColor;
+//in vec4 fragColor;
 in vec3 fragNormal;
 
 // Input uniform values

examples/shaders/resources/shaders/glsl330/lighting_instancing.vs

@@ -4,7 +4,7 @@
 in vec3 vertexPosition;
 in vec2 vertexTexCoord;
 in vec3 vertexNormal;
-in vec4 vertexColor;
+//in vec4 vertexColor;      // Not required
 
 in mat4 instanceTransform;
 
@@ -28,7 +28,7 @@ void main()
     // Send vertex attributes to fragment shader
     fragPosition = vec3(mvpi*vec4(vertexPosition, 1.0));
     fragTexCoord = vertexTexCoord;
-    fragColor = vertexColor;
+    //fragColor = vertexColor;
     fragNormal = normalize(vec3(matNormal*vec4(vertexNormal, 1.0)));
 
     // Calculate final vertex position

examples/shaders/shaders_mesh_instancing.c

@@ -19,7 +19,6 @@
 #include "rlights.h"
 
 #include <stdlib.h>         // Required for: calloc(), free()
-#include <math.h>           // Required for: 
 
 #if defined(PLATFORM_DESKTOP)
     #define GLSL_VERSION            330
@@ -27,7 +26,7 @@
     #define GLSL_VERSION            100
 #endif
 
-#define MAX_INSTANCES  8000
+#define MAX_INSTANCES  10000
 
 //------------------------------------------------------------------------------------
 // Program main entry point
@@ -87,7 +86,9 @@ int main(void)
     matInstances.shader = shader;
     matInstances.maps[MATERIAL_MAP_DIFFUSE].color = RED;
 
-    // Create a defult material with default internal shader for non-instanced mesh drawing
+    // Load default material (using raylib intenral default shader) for non-instanced mesh drawing
+    // WARNING: Default shader enables vertex color attribute BUT GenMeshCube() does not generate vertex colors, so,
+    // when drawing the color attribute is disabled and a default color value is provided as input for thevertex attribute
     Material matDefault = LoadMaterialDefault();
     matDefault.maps[MATERIAL_MAP_DIFFUSE].color = BLUE;