Initial commit

examples/shaders/postprocessing/glsl330/base.vs

@@ -0,0 +1,26 @@
+#version 330
+
+// Input vertex attributes
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+// Input uniform values
+uniform mat4 mvpMatrix;
+
+// Output vertex attributes (to fragment shader)
+out vec2 fragTexCoord;
+out vec4 fragColor;
+
+// NOTE: Add here your custom variables 
+
+void main()
+{
+    // Send vertex attributes to fragment shader
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    
+    // Calculate final vertex position
+    gl_Position = mvpMatrix*vec4(vertexPosition, 1.0);
+}

examples/shaders/postprocessing/glsl330/bloom.fs

@@ -0,0 +1,40 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+
+// Output fragment color
+out vec4 finalColor;
+
+// NOTE: Add here your custom variables
+
+const vec2 size = vec2(800, 450);   // render size
+const float samples = 5.0;          // pixels per axis; higher = bigger glow, worse performance
+const float quality = 2.5; 	        // lower = smaller glow, better quality
+
+void main()
+{
+    vec4 sum = vec4(0);
+    vec2 sizeFactor = vec2(1)/size*quality;
+
+    // Texel color fetching from texture sampler
+    vec4 source = texture(texture0, fragTexCoord);
+
+    const int range = 2;            // should be = (samples - 1)/2;
+
+    for (int x = -range; x <= range; x++)
+    {
+        for (int y = -range; y <= range; y++)
+        {
+            sum += texture(texture0, fragTexCoord + vec2(x, y)*sizeFactor);
+        }
+    }
+
+    // Calculate final fragment color
+    finalColor = ((sum/(samples*samples)) + source)*colDiffuse;
+}

examples/shaders/postprocessing/main.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	raylib.SetConfigFlags(raylib.FlagMsaa4xHint | raylib.FlagVsyncHint) // Enable Multi Sampling Anti Aliasing 4x (if available)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [shaders] example - postprocessing shader")
+
+	camera := raylib.Camera{}
+	camera.Position = raylib.NewVector3(3.0, 3.0, 3.0)
+	camera.Target = raylib.NewVector3(0.0, 1.5, 0.0)
+	camera.Up = raylib.NewVector3(0.0, 1.0, 0.0)
+	camera.Fovy = 45.0
+
+	dwarf := raylib.LoadModel("dwarf.obj")             // Load OBJ model
+	texture := raylib.LoadTexture("dwarf_diffuse.png") // Load model texture
+	dwarf.Material.TexDiffuse = texture                // Set dwarf model diffuse texture
+
+	position := raylib.NewVector3(0.0, 0.0, 0.0) // Set model position
+
+	shader := raylib.LoadShader("glsl330/base.vs", "glsl330/bloom.fs") // Load postpro shader
+
+	// Create a RenderTexture2D to be used for render to texture
+	target := raylib.LoadRenderTexture(screenWidth, screenHeight)
+
+	raylib.SetCameraMode(camera, raylib.CameraOrbital) // Set free camera mode
+
+	//raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		raylib.UpdateCamera(&camera) // Update camera
+
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+
+		raylib.BeginTextureMode(target) // Enable drawing to texture
+
+		raylib.Begin3dMode(camera)
+
+		raylib.DrawModel(dwarf, position, 2.0, raylib.White) // Draw 3d model with texture
+
+		raylib.DrawGrid(10, 1.0) // Draw a grid
+
+		raylib.End3dMode()
+
+		raylib.DrawText("HELLO POSTPROCESSING!", 70, 190, 50, raylib.Red)
+
+		raylib.EndTextureMode() // End drawing to texture (now we have a texture available for next passes)
+
+		raylib.BeginShaderMode(shader)
+
+		// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
+		raylib.DrawTextureRec(target.Texture, raylib.NewRectangle(0, 0, target.Texture.Width, -target.Texture.Height), raylib.NewVector2(0, 0), raylib.White)
+
+		raylib.EndShaderMode()
+
+		raylib.DrawText("(c) Dwarf 3D model by David Moreno", screenWidth-200, screenHeight-20, 10, raylib.Gray)
+
+		raylib.DrawFPS(10, 10)
+
+		raylib.EndDrawing()
+	}
+
+	raylib.UnloadShader(shader)        // Unload shader
+	raylib.UnloadTexture(texture)      // Unload texture
+	raylib.UnloadModel(dwarf)          // Unload model
+	raylib.UnloadRenderTexture(target) // Unload render texture
+
+	raylib.CloseWindow()
+}