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 GlUtils::draw3dVector(glm::vec3 vec, const glm::vec3 & col) {
Mesh m;
m.color = Colors::gray;
m.addVertex(glm::vec3());
m.addVertex(glm::vec3(vec.x, 0, vec.z));
m.addVertex(glm::vec3(vec.x, 0, vec.z));
m.addVertex(vec);
m.fillColors(true);
m.color = col;
m.addVertex(vec);
m.addVertex(glm::vec3());
m.fillColors();
static gl::GeometryPtr g = m.getGeometry(GL_LINES);
g->updateVertices(m.buildVertices());
gl::ProgramPtr program = getProgram(
Resource::SHADERS_COLORED_VS,
Resource::SHADERS_COLORED_FS);
program->use();
renderGeometry(g, program);
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 initParticles(uint32_t num_particles)
{
m_geom = gl::Geometry::create();
m_geom->setPrimitiveType(GL_POINTS);
m_mesh = gl::Mesh::create(m_geom, m_pointMaterial);
m_numParticles = num_particles;
GLsizei numBytes = m_numParticles * sizeof(vec4);
m_geom->vertices().resize(m_numParticles, vec3(0));
m_geom->colors().resize(m_numParticles, vec4(1));
m_geom->point_sizes().resize(m_numParticles, 9.f);
m_geom->createGLBuffers();
m_mesh->material()->setPointSize(2.f);
scene().addObject(m_mesh);
try
{
// shared position buffer for OpenGL / OpenCL
m_positions = cl::BufferGL(m_context, CL_MEM_READ_WRITE, m_geom->vertexBuffer().id());
m_colors = cl::BufferGL(m_context, CL_MEM_READ_WRITE, m_geom->colorBuffer().id());
//create the OpenCL only arrays
m_velocities = cl::Buffer( m_context, CL_MEM_WRITE_ONLY, numBytes );
m_positionGen = cl::Buffer( m_context, CL_MEM_WRITE_ONLY, numBytes );
m_velocityGen = cl::Buffer( m_context, CL_MEM_WRITE_ONLY, numBytes );
vector<vec4> posGen, velGen;
for (int i = 0; i < m_numParticles; i++)
{
posGen.push_back( vec4(glm::ballRand(20.0f), 1.f) );
vec2 tmp = glm::linearRand(vec2(-100), vec2(100));
float life = kinski::random(2.f, 5.f);
float yVel = kinski::random<float>(5, 15);
velGen.push_back(vec4(tmp.x, yVel, tmp.y, life));
m_geom->point_sizes()[i] = kinski::random(5.f, 15.f);
}
m_geom->createGLBuffers();
m_queue.enqueueWriteBuffer(m_velocities, CL_TRUE, 0, numBytes, &velGen[0]);
m_queue.enqueueWriteBuffer(m_positionGen, CL_TRUE, 0, numBytes, &posGen[0]);
m_queue.enqueueWriteBuffer(m_velocityGen, CL_TRUE, 0, numBytes, &velGen[0]);
m_particleKernel.setArg(0, m_positions);
m_particleKernel.setArg(1, m_colors);
m_particleKernel.setArg(2, m_velocities);
m_particleKernel.setArg(3, m_positionGen);
m_particleKernel.setArg(4, m_velocityGen);
}
catch(cl::Error &error)
{
LOG_ERROR << error.what() << "(" << oclErrorString(error.err()) << ")";
}
}
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);
});
}
