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Added new DomeProjection example · ddf/processing@28e7351 · GitHub

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  2. processing

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Commit 28e7351

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Added new DomeProjection example
1 parent ab35b31 commit 28e7351

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

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

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

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

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uniform sampler2D texture;uniform samplerCube EnvMap;varying vec3 reflectDir;uniform vec2 texOffset;varying vec4 vertColor;varying vec4 vertTexCoord;void main() {// gl_FragColor = texture2D(texture, vertTexCoord.st) * vertColor; vec3 envColor = vec3(textureCube(EnvMap, reflectDir)); gl_FragColor = vec4(envColor, 1.0); }/*void main() { // Look up environment map value in cube map vec3 envColor = vec3(textureCube(EnvMap, ReflectDir)); gl_FragColor = vec4(envColor, 1.0); }*/

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

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#define PROCESSING_TEXTURE_SHADERuniform mat4 transform;uniform mat4 modelview;uniform mat4 texMatrix;attribute vec4 vertex;attribute vec4 color;attribute vec2 texCoord;attribute vec3 normal;varying vec4 vertColor;varying vec4 vertTexCoord;uniform mat3 normalMatrix;varying vec3 reflectDir;void main() { gl_Position = transform * vertex; vec3 ecNormal = normalize(normalMatrix * normal); // Vertex in eye coordinates vec3 ecVertex = vec3(modelview * vertex); // Normal vector in eye coordinates vec3 eyeDir = ecVertex.xyz; reflectDir = reflect(eyeDir, ecNormal); vertColor = color; vertTexCoord = texMatrix * vec4(texCoord, 1.0, 1.0);}/*varying vec3 ReflectDir;void main() { gl_Position = ftransform(); vec3 normal = normalize(gl_NormalMatrix * gl_Normal); vec4 pos = gl_ModelViewMatrix * gl_Vertex; vec3 eyeDir = pos.xyz; ReflectDir = reflect(eyeDir, normal);}*/

‎java/examples/Topics/Shaders/DomeProjection/data/grid.png‎

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