Add api and example for mesh drawing.
This commit is contained in:
jackji
parent
ace572fead
commit
15ed58856b
7 changed files with 510 additions and 18 deletions
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#version 330
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// Input vertex attributes
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in vec3 vertexPosition;
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in vec2 vertexTexCoord;
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in vec3 vertexNormal;
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in vec4 vertexColor;
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in mat4 instanceTransform;
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// Input uniform values
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uniform mat4 mvp;
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uniform mat4 matNormal;
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// Output vertex attributes (to fragment shader)
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out vec3 fragPosition;
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out vec2 fragTexCoord;
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out vec4 fragColor;
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out vec3 fragNormal;
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// NOTE: Add here your custom variables
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void main()
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{
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// Compute MVP for current instance
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mat4 mvpi = mvp*instanceTransform;
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// Send vertex attributes to fragment shader
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fragPosition = vec3(mvpi*vec4(vertexPosition, 1.0));
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fragTexCoord = vertexTexCoord;
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fragColor = vertexColor;
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fragNormal = normalize(vec3(matNormal*vec4(vertexNormal, 1.0)));
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// Calculate final vertex position
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gl_Position = mvpi*vec4(vertexPosition, 1.0);
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}
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82
examples/shaders/mesh_instancing/glsl330/lighting.fs
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82
examples/shaders/mesh_instancing/glsl330/lighting.fs
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#version 330
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// Input vertex attributes (from vertex shader)
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in vec3 fragPosition;
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in vec2 fragTexCoord;
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in vec4 fragColor;
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in vec3 fragNormal;
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// Input uniform values
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uniform sampler2D texture0;
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uniform vec4 colDiffuse;
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// Output fragment color
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out vec4 finalColor;
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// NOTE: Add here your custom variables
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#define MAX_LIGHTS 4
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#define LIGHT_DIRECTIONAL 0
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#define LIGHT_POINT 1
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struct MaterialProperty {
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vec3 color;
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int useSampler;
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sampler2D sampler;
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};
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struct Light {
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int enabled;
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int type;
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vec3 position;
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vec3 target;
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vec4 color;
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};
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// Input lighting values
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uniform Light lights[MAX_LIGHTS];
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uniform vec4 ambient;
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uniform vec3 viewPos;
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void main()
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{
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// Texel color fetching from texture sampler
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vec4 texelColor = texture(texture0, fragTexCoord);
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vec3 lightDot = vec3(0.0);
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vec3 normal = normalize(fragNormal);
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vec3 viewD = normalize(viewPos - fragPosition);
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vec3 specular = vec3(0.0);
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// NOTE: Implement here your fragment shader code
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for (int i = 0; i < MAX_LIGHTS; i++)
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{
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if (lights[i].enabled == 1)
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{
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vec3 light = vec3(0.0);
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if (lights[i].type == LIGHT_DIRECTIONAL)
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{
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light = -normalize(lights[i].target - lights[i].position);
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}
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if (lights[i].type == LIGHT_POINT)
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{
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light = normalize(lights[i].position - fragPosition);
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}
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float NdotL = max(dot(normal, light), 0.0);
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lightDot += lights[i].color.rgb*NdotL;
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float specCo = 0.0;
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if (NdotL > 0.0) specCo = pow(max(0.0, dot(viewD, reflect(-(light), normal))), 16.0); // 16 refers to shine
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specular += specCo;
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}
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}
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finalColor = (texelColor*((colDiffuse + vec4(specular, 1.0))*vec4(lightDot, 1.0)));
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finalColor += texelColor*(ambient/10.0)*colDiffuse;
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// Gamma correction
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finalColor = pow(finalColor, vec4(1.0/2.2));
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}
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92
examples/shaders/mesh_instancing/light.go
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92
examples/shaders/mesh_instancing/light.go
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package main
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import (
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"fmt"
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"reflect"
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"unsafe"
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rl "github.com/gen2brain/raylib-go/raylib"
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)
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type LightType int32
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const (
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LightTypeDirectional LightType = iota
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LightTypePoint
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)
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type Light struct {
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shader rl.Shader
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lightType LightType
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position rl.Vector3
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target rl.Vector3
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color rl.Color
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enabled int32
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// shader locations
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enabledLoc int32
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typeLoc int32
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posLoc int32
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targetLoc int32
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colorLoc int32
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}
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const maxLightsCount = 4
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var lightCount = 0
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func NewLight(
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lightType LightType,
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position, target rl.Vector3,
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color rl.Color,
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shader rl.Shader) Light {
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light := Light{
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shader: shader,
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}
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if lightCount < maxLightsCount {
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light.enabled = 1
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light.lightType = lightType
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light.position = position
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light.target = target
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light.color = color
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light.enabledLoc = rl.GetShaderLocation(shader, fmt.Sprintf("lights[%d].enabled", lightCount))
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light.typeLoc = rl.GetShaderLocation(shader, fmt.Sprintf("lights[%d].type", lightCount))
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light.posLoc = rl.GetShaderLocation(shader, fmt.Sprintf("lights[%d].position", lightCount))
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light.targetLoc = rl.GetShaderLocation(shader, fmt.Sprintf("lights[%d].target", lightCount))
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light.colorLoc = rl.GetShaderLocation(shader, fmt.Sprintf("lights[%d].color", lightCount))
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light.UpdateValues()
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lightCount++
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}
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return light
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}
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// Send light properties to shader
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func (lt *Light) UpdateValues() {
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// not pretty -_-
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// need nicer api
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sh := &reflect.SliceHeader{
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Len: 4,
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Cap: 4,
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}
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// Send to shader light enabled state and type
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sh.Data = uintptr(unsafe.Pointer(<.enabled))
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rl.SetShaderValue(lt.shader, lt.enabledLoc, *(*[]float32)(unsafe.Pointer(sh)), rl.ShaderUniformInt)
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// Send to shader light position values
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sh.Data = uintptr(unsafe.Pointer(<.lightType))
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rl.SetShaderValue(lt.shader, lt.posLoc, []float32{lt.position.X, lt.position.Y, lt.position.Z}, rl.ShaderUniformVec3)
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// Send to shader light target target values
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rl.SetShaderValue(lt.shader, lt.targetLoc, []float32{lt.target.X, lt.target.Y, lt.target.Z}, rl.ShaderUniformVec3)
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// Send to shader light color values
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rl.SetShaderValue(lt.shader, lt.colorLoc,
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[]float32{float32(lt.color.R) / 255, float32(lt.color.G) / 255, float32(lt.color.B) / 255, float32(lt.color.A) / 255},
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rl.ShaderUniformVec4)
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}
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253
examples/shaders/mesh_instancing/main.go
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253
examples/shaders/mesh_instancing/main.go
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package main
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import (
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"fmt"
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"math"
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rl "github.com/gen2brain/raylib-go/raylib"
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)
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const MAX_INSTANCES = 100000
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func main() {
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var (
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screenWidth = int32(800) // Framebuffer width
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screenHeight = int32(450) // Framebuffer height
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fps = 60 // Frames per second
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speed = 30 // Speed of jump animation
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groups = 2 // Count of separate groups jumping around
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amp = float32(10) // Maximum amplitude of jump
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variance = float32(0.8) // Global variance in jump height
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loop = float32(0.0) // Individual cube's computed loop timer
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textPositionY int32 = 300
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framesCounter = 0
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)
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rl.SetConfigFlags(rl.FlagMsaa4xHint) // Enable Multi Sampling Anti Aliasing 4x (if available)
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rl.InitWindow(screenWidth, screenHeight, "raylib [shaders] example - mesh instancing")
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// Define the camera to look into our 3d world
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camera := rl.Camera{
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Position: rl.NewVector3(-125.0, 125.0, -125.0),
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Target: rl.NewVector3(0.0, 0.0, 0.0),
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Up: rl.NewVector3(0.0, 1.0, 0.0),
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Fovy: 45.0,
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Projection: rl.CameraPerspective,
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}
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cube := rl.GenMeshCube(1.0, 1.0, 1.0)
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rotations := make([]rl.Matrix, MAX_INSTANCES) // Rotation state of instances
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rotationsInc := make([]rl.Matrix, MAX_INSTANCES) // Per-frame rotation animation of instances
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translations := make([]rl.Matrix, MAX_INSTANCES) // Locations of instances
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// Scatter random cubes around
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for i := 0; i < MAX_INSTANCES; i++ {
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x := float32(rl.GetRandomValue(-50, 50))
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y := float32(rl.GetRandomValue(-50, 50))
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z := float32(rl.GetRandomValue(-50, 50))
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translations[i] = rl.MatrixTranslate(x, y, z)
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x = float32(rl.GetRandomValue(0, 360))
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y = float32(rl.GetRandomValue(0, 360))
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z = float32(rl.GetRandomValue(0, 360))
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axis := rl.Vector3Normalize(rl.NewVector3(x, y, z))
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angle := float32(rl.GetRandomValue(0, 10)) * rl.Deg2rad
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rotationsInc[i] = rl.MatrixRotate(axis, angle)
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rotations[i] = rl.MatrixIdentity()
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}
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transforms := make([]rl.Matrix, MAX_INSTANCES)
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shader := rl.LoadShader("glsl330/base_lighting_instanced.vs", "glsl330/lighting.fs")
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shader.UpdateLocation(rl.LocMatrixMvp, rl.GetShaderLocation(shader, "mvp"))
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shader.UpdateLocation(rl.LocVectorView, rl.GetShaderLocation(shader, "viewPos"))
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shader.UpdateLocation(rl.LocMatrixModel, rl.GetShaderLocationAttrib(shader, "instanceTransform"))
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// ambient light level
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ambientLoc := rl.GetShaderLocation(shader, "ambient")
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rl.SetShaderValue(shader, ambientLoc, []float32{0.2, 0.2, 0.2, 1.0}, rl.ShaderUniformVec4)
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NewLight(LightTypeDirectional, rl.NewVector3(50.0, 50.0, 0.0), rl.Vector3Zero(), rl.White, shader)
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material := rl.LoadMaterialDefault()
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material.Shader = shader
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mmap := material.GetMap(rl.MapDiffuse)
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mmap.Color = rl.Red
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rl.SetCameraMode(camera, rl.CameraOrbital)
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rl.SetTargetFPS(int32(fps))
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for !rl.WindowShouldClose() {
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// Update
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//----------------------------------------------------------------------------------
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textPositionY = 300
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framesCounter++
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if rl.IsKeyDown(rl.KeyUp) {
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amp += 0.5
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}
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if rl.IsKeyDown(rl.KeyDown) {
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if amp <= 1 {
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amp = 1
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} else {
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amp -= 1
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}
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}
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if rl.IsKeyDown(rl.KeyLeft) {
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if variance < 0 {
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variance = 0
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} else {
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variance -= 0.01
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}
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}
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if rl.IsKeyDown(rl.KeyRight) {
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if variance > 1 {
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variance = 1
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} else {
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variance += 0.01
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}
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}
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if rl.IsKeyDown(rl.KeyOne) {
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groups = 1
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}
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if rl.IsKeyDown(rl.KeyTwo) {
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groups = 2
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}
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if rl.IsKeyDown(rl.KeyThree) {
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groups = 3
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}
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if rl.IsKeyDown(rl.KeyFour) {
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groups = 4
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}
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if rl.IsKeyDown(rl.KeyFive) {
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groups = 5
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}
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if rl.IsKeyDown(rl.KeySix) {
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groups = 6
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}
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if rl.IsKeyDown(rl.KeySeven) {
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groups = 7
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}
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if rl.IsKeyDown(rl.KeyEight) {
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groups = 8
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}
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if rl.IsKeyDown(rl.KeyNine) {
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groups = 9
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}
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if rl.IsKeyDown(rl.KeyW) {
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groups = 7
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amp = 25
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speed = 18
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variance = float32(0.70)
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}
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if rl.IsKeyDown(rl.KeyEqual) {
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if float32(speed) <= float32(fps)*0.25 {
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speed = int(float32(fps) * 0.25)
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} else {
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speed = int(float32(speed) * 0.95)
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}
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}
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if rl.IsKeyDown(rl.KeyKpAdd) {
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if float32(speed) <= float32(fps)*0.25 {
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speed = int(float32(fps) * 0.25)
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} else {
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speed = int(float32(speed) * 0.95)
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}
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}
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if rl.IsKeyDown(rl.KeyMinus) {
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speed = int(math.Max(float64(speed)*1.02, float64(speed)+1))
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}
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if rl.IsKeyDown(rl.KeyKpSubtract) {
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speed = int(math.Max(float64(speed)*1.02, float64(speed)+1))
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}
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// Update the light shader with the camera view position
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rl.SetShaderValue(shader, shader.GetLocation(rl.LocVectorView),
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[]float32{camera.Position.X, camera.Position.Y, camera.Position.Z}, rl.ShaderUniformVec3)
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// Apply per-instance transformations
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for i := 0; i < MAX_INSTANCES; i++ {
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rotations[i] = rl.MatrixMultiply(rotations[i], rotationsInc[i])
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transforms[i] = rl.MatrixMultiply(rotations[i], translations[i])
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// Get the animation cycle's framesCounter for this instance
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loop = float32((framesCounter+int(float32(i%groups)/float32(groups)*float32(speed)))%speed) / float32(speed)
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// Calculate the y according to loop cycle
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y := float32(math.Sin(float64(loop)*rl.Pi*2)) * amp *
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((1 - variance) + (float32(variance) * float32(i%(groups*10)) / float32(groups*10)))
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// Clamp to floor
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if y < 0 {
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y = 0
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}
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transforms[i] = rl.MatrixMultiply(transforms[i], rl.MatrixTranslate(0.0, y, 0.0))
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}
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rl.UpdateCamera(&camera) // Update camera
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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rl.BeginDrawing()
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{
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rl.ClearBackground(rl.RayWhite)
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rl.BeginMode3D(camera)
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//rl.DrawMesh(cube, material, rl.MatrixIdentity())
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rl.DrawMeshInstanced(cube, material, transforms, MAX_INSTANCES)
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rl.EndMode3D()
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rl.DrawText("A CUBE OF DANCING CUBES!", 490, 10, 20, rl.Maroon)
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rl.DrawText("PRESS KEYS:", 10, textPositionY, 20, rl.Black)
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textPositionY += 25
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rl.DrawText("1 - 9", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": Number of groups", 50, textPositionY, 10, rl.Black)
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rl.DrawText(fmt.Sprintf(": %d", groups), 160, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("UP", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": increase amplitude", 50, textPositionY, 10, rl.Black)
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rl.DrawText(fmt.Sprintf(": %.2f", amp), 160, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("DOWN", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": decrease amplitude", 50, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("LEFT", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": decrease variance", 50, textPositionY, 10, rl.Black)
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rl.DrawText(fmt.Sprintf(": %.2f", variance), 160, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("RIGHT", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": increase variance", 50, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("+/=", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": increase speed", 50, textPositionY, 10, rl.Black)
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rl.DrawText(fmt.Sprintf(": %d = %f loops/sec", speed, float32(fps)/float32(speed)), 160, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("-", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": decrease speed", 50, textPositionY, 10, rl.Black)
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textPositionY += 15
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rl.DrawText("W", 10, textPositionY, 10, rl.Black)
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rl.DrawText(": Wild setup!", 50, textPositionY, 10, rl.Black)
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rl.DrawFPS(10, 10)
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}
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rl.EndDrawing()
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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rl.CloseWindow() // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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}
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