Added new DomeProjection example

java/examples/Topics/Shaders/DomeProjection/CubeMapUtils.pde

@@ -0,0 +1,99 @@
+void initCubeMap() {
+  gridTex = loadImage("grid.png");
+  sphereDetail(50);
+  domeSphere = createShape(SPHERE, height/2.0f);
+  domeSphere.setTexture(gridTex);
+  domeSphere.rotateX(HALF_PI);
+  domeSphere.setStroke(false);
+
+  PGL pgl = beginPGL();
+
+  envMapTextureID = IntBuffer.allocate(1);
+  pgl.genTextures(1, envMapTextureID);
+  pgl.bindTexture(PGL.TEXTURE_CUBE_MAP, envMapTextureID.get(0));
+  pgl.texParameteri(PGL.TEXTURE_CUBE_MAP, PGL.TEXTURE_WRAP_S, PGL.CLAMP_TO_EDGE);
+  pgl.texParameteri(PGL.TEXTURE_CUBE_MAP, PGL.TEXTURE_WRAP_T, PGL.CLAMP_TO_EDGE);
+  pgl.texParameteri(PGL.TEXTURE_CUBE_MAP, PGL.TEXTURE_WRAP_R, PGL.CLAMP_TO_EDGE);
+  pgl.texParameteri(PGL.TEXTURE_CUBE_MAP, PGL.TEXTURE_MIN_FILTER, PGL.NEAREST);
+  pgl.texParameteri(PGL.TEXTURE_CUBE_MAP, PGL.TEXTURE_MAG_FILTER, PGL.NEAREST);
+  for (int i = PGL.TEXTURE_CUBE_MAP_POSITIVE_X; i < PGL.TEXTURE_CUBE_MAP_POSITIVE_X + 6; i++) {
+    pgl.texImage2D(i, 0, PGL.RGBA8, envMapSize, envMapSize, 0, PGL.RGBA, PGL.UNSIGNED_BYTE, null);
+  }
+
+  // Init fbo, rbo
+  fbo = IntBuffer.allocate(1);
+  rbo = IntBuffer.allocate(1);
+  pgl.genFramebuffers(1, fbo);
+  pgl.bindFramebuffer(PGL.FRAMEBUFFER, fbo.get(0));
+  pgl.framebufferTexture2D(PGL.FRAMEBUFFER, PGL.COLOR_ATTACHMENT0, PGL.TEXTURE_CUBE_MAP_POSITIVE_X, envMapTextureID.get(0), 0);
+
+  pgl.genRenderbuffers(1, rbo);
+  pgl.bindRenderbuffer(PGL.RENDERBUFFER, rbo.get(0));
+  pgl.renderbufferStorage(PGL.RENDERBUFFER, PGL.DEPTH_COMPONENT24, envMapSize, envMapSize);
+
+  // Attach depth buffer to FBO
+  pgl.framebufferRenderbuffer(PGL.FRAMEBUFFER, PGL.DEPTH_ATTACHMENT, PGL.RENDERBUFFER, rbo.get(0));    
+
+  pgl.enable(PGL.TEXTURE_CUBE_MAP);
+  pgl.activeTexture(PGL.TEXTURE1);
+  pgl.bindTexture(PGL.TEXTURE_CUBE_MAP, envMapTextureID.get(0));     
+
+  endPGL();
+
+  // Load cubemap shader.
+  cubemapShader = loadShader("cubemapfrag.glsl", "cubemapvert.glsl");
+  cubemapShader.set("EnvMap", 1);
+}
+
+void drawCubeMap() {
+  regenerateEnvMap();
+  drawDomeMaster();
+}
+
+void drawDomeMaster() {
+  ortho();
+  resetMatrix();
+  shader(cubemapShader);
+  shape(domeSphere);
+  resetShader();
+}
+
+// Called to regenerate the envmap
+void regenerateEnvMap() {    
+  PGL pgl = beginPGL();
+
+  // bind fbo
+  pgl.bindFramebuffer(PGL.FRAMEBUFFER, fbo.get(0));
+
+  // generate 6 views from origin(0, 0, 0)
+  pgl.viewport(0, 0, envMapSize, envMapSize);    
+  perspective(90.0f * DEG_TO_RAD, 1.0f, 1.0f, 1025.0f);  
+  for (int face = PGL.TEXTURE_CUBE_MAP_POSITIVE_X; face < 
+                  PGL.TEXTURE_CUBE_MAP_NEGATIVE_Z; face++) {
+    resetMatrix();
+
+    if (face == PGL.TEXTURE_CUBE_MAP_POSITIVE_X) {
+      camera(0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f);
+    } else if (face == PGL.TEXTURE_CUBE_MAP_NEGATIVE_X) {
+      camera(0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f);
+    } else if (face == PGL.TEXTURE_CUBE_MAP_POSITIVE_Y) {
+      camera(0.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f, -1.0f);  
+    } else if (face == PGL.TEXTURE_CUBE_MAP_NEGATIVE_Y) {
+      camera(0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f);
+    } else if (face == PGL.TEXTURE_CUBE_MAP_POSITIVE_Z) {
+      camera(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f);    
+    }
+    
+    scale(-1, 1, -1);
+    translate(-width * 0.5f, -height * 0.5f, -500);
+
+    pgl.framebufferTexture2D(PGL.FRAMEBUFFER, PGL.COLOR_ATTACHMENT0, face, envMapTextureID.get(0), 0);
+
+    drawScene(); // Draw objects in the scene
+    flush(); // Make sure that the geometry in the scene is pushed to the GPU    
+    noLights();  // Disabling lights to avoid adding many times
+    pgl.framebufferTexture2D(PGL.FRAMEBUFFER, PGL.COLOR_ATTACHMENT0, face, 0, 0);
+  }
+
+  endPGL();
+}

java/examples/Topics/Shaders/DomeProjection/DomeProjection.pde

@@ -0,0 +1,52 @@
+/**
+ * DomeProjection
+ * 
+ * This sketch uses use environmental mapping to render the output 
+ * on a full spherical come.
+ * 
+ * Based on the FullDomeTemplate code from Christopher Warnow: 
+ * https://github.com/mphasize/FullDome
+ * 
+ */
+ 
+import java.nio.IntBuffer;
+
+PShader cubemapShader;
+PShape domeSphere;
+PImage gridTex;
+
+IntBuffer fbo;
+IntBuffer rbo;
+IntBuffer envMapTextureID;
+
+int envMapSize = 1024;   
+
+void setup() {
+  size(640, 640, P3D);  
+  initCubeMap();
+}
+
+void draw() {
+  background(0);
+  drawCubeMap();  
+}
+
+void drawScene() {  
+  background(0);
+  stroke(255, 0, 0);
+  strokeWeight(2);
+  for (int i = -width; i < 2 * width; i += 50) {
+    line(i, -height, -100, i, 2 *height, -100);
+  }
+  for (int i = -height; i < 2 * height; i += 50) {
+    line(-width, i, -100, 2 * width, i, -100);
+  }
+  
+  lights();
+  noStroke();
+  translate(mouseX, mouseY, 200);
+  rotateX(frameCount * 0.01);
+  rotateY(frameCount * 0.01);  
+  box(100);  
+}
+

java/examples/Topics/Shaders/DomeProjection/data/cubemapfrag.glsl

@@ -0,0 +1 @@
+uniform sampler2D texture;

java/examples/Topics/Shaders/DomeProjection/data/cubemapvert.glsl

@@ -0,0 +1 @@
+#define PROCESSING_TEXTURE_SHADER