static void shadowStuff(RenderPass basePass, RenderPass lightPass, Texture shadowTexture) {
Mat4 viewTransform = basePass.getView().getCameraMatrix();
Mat4 lightTransform = lightPass.getView().getCameraMatrix();
Mat4 homogenToTexCoord = new Mat4().translate(0.5f, 0.5f, 0.5f).scale(0.5, 0.5, 0.5);
Mat4 viewToTexture = new Mat4();
viewToTexture.mul(homogenToTexCoord);
viewToTexture.mul(lightPass.getView().getProjectionMatrix());
viewToTexture.mul_(new Mat4(lightTransform));
viewToTexture.mul_(new Mat4(viewTransform).invert_());
Mat4 lightToView = new Mat4();
lightToView.mul_(new Mat4(viewTransform));
lightToView.mul_(new Mat4(lightTransform).invert_());
Vec3 lightPosVS = lightToView.transformAsPoint(new Vec3());
Shader shader = createShader(viewToTexture);
shader.putUniform(new Uniform("lightPosVS", Uniform.Type.VEC3, lightPosVS.toFloats()));
for (Shape shape : basePass.getAllShapes()) {
shape.getState().setShader(shader);
shape.getState().setUnit(0, new Unit(shadowTexture));
}
Shader spotLightShader = new Shader(loadProgram("storeMoments"));
for (Shape shape : lightPass.getAllShapes()) {
shape.getState().setShader(spotLightShader);
}
}
public static void main(String[] args) throws Exception {
Display.setDisplayMode(new DisplayMode(640, 480));
Display.create();
Shape baseBox = new Shape(VertexDataUtils.createBox(new Vec3(-1, 1, -1), new Vec3(1, 3, 1)));
Texture baseTexture = SGUtil.createTexture(GL11.GL_RGBA, 128, 128);
RenderTarget baseTarget =
new RenderTarget(128, 128, new DepthBuffer(GL30.GL_DEPTH24_STENCIL8), false, baseTexture);
RenderPass basePass = new RenderPass();
basePass.setClearMask(GL11.GL_DEPTH_BUFFER_BIT | GL11.GL_COLOR_BUFFER_BIT);
basePass.setClearColor(new Color4f(0, 1, 1, 0));
basePass.setView(View.createPerspective((float) Math.PI / 4f, 1, 0.1f, 100f));
basePass
.getView()
.setCameraMatrix(new Mat4().rotateEulerDeg(-30, 0, 0).translate(0, 0, 10).invert_());
basePass.setRenderTarget(baseTarget);
basePass.addShape(
new Shape(VertexDataUtils.createBox(new Vec3(-4, -1, -4), new Vec3(4, 0, 4))));
basePass.addShape(baseBox);
int w = 256;
int h = 256;
ByteBuffer[][] pixels = {{BufferUtils.createByteBuffer(w * h * 4)}};
Texture shadowTexture =
new Texture(
TextureType.TEXTURE_2D, GL30.GL_RG32F, w, h, 0, Format.RGBA, pixels, false, false);
shadowTexture.setWrapS(Wrap.CLAMP_TO_EDGE);
shadowTexture.setWrapT(Wrap.CLAMP_TO_EDGE);
// shadowTexture.setMinFilter(MinFilter.LINEAR_MIPMAP_LINEAR);
shadowTexture.setMaxAnisotropy(4f);
RenderTarget shadowTarget =
new RenderTarget(w, h, new DepthBuffer(GL11.GL_DEPTH_COMPONENT), false, shadowTexture);
RenderPass shadowPass = new RenderPass();
shadowPass.setClearMask(GL11.GL_DEPTH_BUFFER_BIT | GL11.GL_COLOR_BUFFER_BIT);
shadowPass.setClearColor(new Color4f(0, 0, 1, 0));
shadowPass.setView(View.createPerspective((float) Math.PI / 4f, 1, 0.1f, 100f));
shadowPass.setRenderTarget(shadowTarget);
shadowPass.addShape(
new Shape(VertexDataUtils.createBox(new Vec3(-4, -1, -4), new Vec3(4, 0, 4))));
shadowPass.addShape(
new Shape(VertexDataUtils.createBox(new Vec3(-1, 1, -1), new Vec3(1, 3, 1))));
shadowPass
.getView()
.setCameraMatrix(new Mat4().rotateEulerDeg(-90 - 45, 120, 0).translate(0, 0, 10).invert_());
Shape baseShape = new Shape(VertexDataUtils.createQuad(50, 100 + 256, 256, -256, 0));
baseShape.getState().setUnit(0, new Unit(baseTexture));
Shape shadowShape = new Shape(VertexDataUtils.createQuad(350, 100, 256, 256, 0));
shadowShape.getState().setUnit(0, new Unit(shadowTexture));
RenderPass finalPass = new RenderPass();
finalPass.setClearMask(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
finalPass.setClearColor(new Color4f(1, 1, 0, 0));
finalPass.setView(View.createOrtho(0, 640, 0, 480, -1000, 1000));
finalPass.addShape(baseShape);
finalPass.addShape(shadowShape);
// Texture testTexture = createSampleTexture();
shadowStuff(basePass, shadowPass, shadowTexture);
ByteBuffer[][] blurPixels = {{BufferUtils.createByteBuffer(128 * 128 * 4)}};
Texture blurTexture =
new Texture(
TextureType.TEXTURE_2D,
GL30.GL_RG32F,
128,
128,
0,
Format.RGBA,
blurPixels,
false,
false);
blurTexture.setWrapS(Wrap.CLAMP_TO_EDGE);
blurTexture.setWrapT(Wrap.CLAMP_TO_EDGE);
SceneGraph finalSceneGraph = new SceneGraph();
finalSceneGraph.addRenderPass(shadowPass);
finalSceneGraph.addRenderPass(
Blur.createPass(shadowTexture, blurTexture, 1.5f / shadowTexture.getWidth(), 0f));
finalSceneGraph.addRenderPass(
Blur.createPass(blurTexture, shadowTexture, 0, 1.5f / shadowTexture.getWidth()));
finalSceneGraph.addRenderPass(basePass);
finalSceneGraph.addRenderPass(finalPass);
Renderer finalRenderer = new Renderer(finalSceneGraph);
int angle = 0;
long startTime = System.currentTimeMillis();
while (!Display.isCloseRequested()) {
if (Mouse.isButtonDown(0)) {
angle += Mouse.getDX();
}
// shadowPass.getView().setCameraMatrix(new Mat4().rotateEulerDeg(-90 - 45, angle,
// 0).translate(0, 0, 14).invert_());
// basePass.getView().setCameraMatrix(new Mat4().rotateEulerDeg(-30, angle, 0).translate(0,
// 0, 10).invert_());
float timeSec = (System.currentTimeMillis() - startTime) / 1000f;
baseBox.setModelMatrix(
new Mat4()
.rotateEulerDeg(0, timeSec * 45, 0)
.translate(0, Math.sin(timeSec * 1.7f) * 2, 0));
for (int i = 0; i < basePass.getShapeCount(); i++) {
shadowPass.getShape(i).setModelMatrix(basePass.getShape(i).getModelMatrix());
}
// shadowRenderer.render();
finalRenderer.render();
Display.update();
}
Display.destroy();
}