void renderEye(StereoEye eye) {
viewport(eye);
gl::ProgramPtr distortProgram = GlUtils::getProgram(
Resource::SHADERS_TEXTURED_VS,
chroma ?
Resource::SHADERS_RIFTCHROMAWARP_FS :
Resource::SHADERS_RIFTWARP_FS);
distortProgram->use();
distortProgram->setUniform1i("Scene", 1);
distortProgram->setUniform1i("OffsetMap", 0);
glActiveTexture(GL_TEXTURE1);
sceneTextures[eye]->bind();
glActiveTexture(GL_TEXTURE0);
lookupTextures[eye]->bind();
quadGeometry->bindVertexArray();
#ifdef DISTORTION_TIMING
query->begin();
#endif
quadGeometry->draw();
#ifdef DISTORTION_TIMING
query->end();
static long accumulator = 0;
static long count = 0;
accumulator += query->getResult();
count++;
SAY("%d ns", accumulator / count);
#endif
gl::VertexArray::unbind();
gl::Texture2d::unbind();
gl::Program::clear();
}
void draw() {
glClearColor(0, 1, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
GL_CHECK_ERROR;
for (int i = 0; i < 2; ++i) {
const EyeArg & eyeArg = eyeArgs[i];
frameBuffer.activate();
renderScene(eyeArg);
frameBuffer.deactivate();
glDisable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
gl::viewport(eyeArg.viewportLocation, eyeSize);
distortProgram->use();
distortProgram->setUniform("LensOffset", eyeArg.lensOffset);
frameBuffer.color->bind();
quadGeometry->bindVertexArray();
quadGeometry->draw();
gl::Geometry::unbindVertexArray();
gl::Program::clear();
}
}
void GlUtils::renderGeometry(
const gl::GeometryPtr & geometry,
gl::ProgramPtr program) {
program->use();
gl::Stacks::lights().apply(program);
gl::Stacks::projection().apply(program);
gl::Stacks::modelview().apply(program);
geometry->bindVertexArray();
geometry->draw();
gl::VertexArray::unbind();
gl::Program::clear();
}
void cubeRecurseDraw(gl::GeometryPtr & cubeGeometry, gl::ProgramPtr & renderProgram, int depth, float elapsed, int axisIndex) {
if (0 == depth) {
return;
}
static glm::vec3 translation(0, 0, 1.5);
const glm::vec3 & axis = AXES[axisIndex % 3];
float angle = elapsed * 0.2f * ((rand() % 10) - 5);
float scale = 0.7f;
gl::MatrixStack & mv = gl::Stacks::modelview();
mv.with_push([&]{
mv.rotate(angle, axis).translate(translation).scale(scale).apply(renderProgram);
cubeGeometry->draw();
cubeRecurseDraw(cubeGeometry, renderProgram, depth - 1, elapsed, axisIndex + 1);
});
mv.with_push([&]{
mv.rotate(angle + PI, axis).translate(translation).scale(scale).apply(renderProgram);
cubeGeometry->draw();
cubeRecurseDraw(cubeGeometry, renderProgram, depth - 1, elapsed, axisIndex + 1);
});
}