void RiftRenderingApp::drawRiftFrame() {
++frameCount;
ovrHmd_BeginFrame(hmd, frameCount);
MatrixStack & mv = Stacks::modelview();
MatrixStack & pr = Stacks::projection();
perFrameRender();
ovrPosef fetchPoses[2];
ovrHmd_GetEyePoses(hmd, frameCount, eyeOffsets, fetchPoses, nullptr);
for (int i = 0; i < 2; ++i) {
ovrEyeType eye = currentEye = hmd->EyeRenderOrder[i];
// Force us to alternate eyes if we aren't keeping up with the required framerate
if (eye == lastEyeRendered) {
continue;
}
// We want to ensure that we only update the pose we
// send to the SDK if we actually render this eye.
eyePoses[eye] = fetchPoses[eye];
lastEyeRendered = eye;
Stacks::withPush(pr, mv, [&] {
// Set up the per-eye projection matrix
pr.top() = projections[eye];
// Set up the per-eye modelview matrix
// Apply the head pose
glm::mat4 eyePose = ovr::toGlm(eyePoses[eye]);
mv.preMultiply(glm::inverse(eyePose));
// Render the scene to an offscreen buffer
eyeFramebuffers[eye]->Bind();
perEyeRender();
});
if (eyePerFrameMode) {
break;
}
}
if (endFrameLock) {
endFrameLock->lock();
}
ovrHmd_EndFrame(hmd, eyePoses, eyeTextures);
if (endFrameLock) {
endFrameLock->unlock();
}
rateCounter.increment();
if (rateCounter.elapsed() > 2.0f) {
float fps = rateCounter.getRate();
updateFps(fps);
rateCounter.reset();
}
}
void QTestWindow::draw() {
if (!isVisible()) {
return;
}
makeCurrent();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, _size.width() * devicePixelRatio(), _size.height() * devicePixelRatio());
_context.swapBuffers(this);
glFinish();
fps.increment();
if (fps.elapsed() >= 2.0f) {
qDebug() << "FPS: " << fps.rate();
fps.reset();
}
}
void draw() {
// Attempting to draw before we're visible and have a valid size will
// produce GL errors.
if (!isVisible() || _size.width() <= 0 || _size.height() <= 0) {
return;
}
makeCurrent();
gpu::Batch batch;
batch.clearColorFramebuffer(gpu::Framebuffer::BUFFER_COLORS, { 0.0f, 0.0f, 0.0f, 1.0f });
batch.clearDepthFramebuffer(1e4);
batch.setViewportTransform({ 0, 0, _size.width() * devicePixelRatio(), _size.height() * devicePixelRatio() });
batch.setProjectionTransform(_projectionMatrix);
float t = _time.elapsed() * 1e-3f;
glm::vec3 unitscale { 1.0f };
glm::vec3 up { 0.0f, 1.0f, 0.0f };
float distance = 3.0f;
glm::vec3 camera_position{ distance * sinf(t), 0.0f, distance * cosf(t) };
static const vec3 camera_focus(0);
static const vec3 camera_up(0, 1, 0);
glm::mat4 camera = glm::inverse(glm::lookAt(camera_position, camera_focus, up));
batch.setViewTransform(camera);
batch.setPipeline(_pipeline);
batch.setModelTransform(Transform());
auto geometryCache = DependencyManager::get<GeometryCache>();
// Render grid on xz plane (not the optimal way to do things, but w/e)
// Note: GeometryCache::renderGrid will *not* work, as it is apparenly unaffected by batch rotations and renders xy only
{
static const std::string GRID_INSTANCE = "Grid";
static auto compactColor1 = toCompactColor(vec4{ 0.35f, 0.25f, 0.15f, 1.0f });
static auto compactColor2 = toCompactColor(vec4{ 0.15f, 0.25f, 0.35f, 1.0f });
static std::vector<glm::mat4> transforms;
static gpu::BufferPointer colorBuffer;
if (!transforms.empty()) {
transforms.reserve(200);
colorBuffer = std::make_shared<gpu::Buffer>();
for (int i = 0; i < 100; ++i) {
{
glm::mat4 transform = glm::translate(mat4(), vec3(0, -1, -50 + i));
transform = glm::scale(transform, vec3(100, 1, 1));
transforms.push_back(transform);
colorBuffer->append(compactColor1);
}
{
glm::mat4 transform = glm::mat4_cast(quat(vec3(0, PI / 2.0f, 0)));
transform = glm::translate(transform, vec3(0, -1, -50 + i));
transform = glm::scale(transform, vec3(100, 1, 1));
transforms.push_back(transform);
colorBuffer->append(compactColor2);
}
}
}
auto pipeline = geometryCache->getSimplePipeline();
for (auto& transform : transforms) {
batch.setModelTransform(transform);
batch.setupNamedCalls(GRID_INSTANCE, [=](gpu::Batch& batch, gpu::Batch::NamedBatchData& data) {
batch.setViewTransform(camera);
batch.setPipeline(_pipeline);
geometryCache->renderWireShapeInstances(batch, GeometryCache::Line, data.count(), colorBuffer);
});
}
}
{
static const size_t ITEM_COUNT = 1000;
static const float SHAPE_INTERVAL = (PI * 2.0f) / ITEM_COUNT;
static const float ITEM_INTERVAL = SHAPE_INTERVAL / TYPE_COUNT;
static const gpu::Element POSITION_ELEMENT{ gpu::VEC3, gpu::FLOAT, gpu::XYZ };
static const gpu::Element NORMAL_ELEMENT{ gpu::VEC3, gpu::FLOAT, gpu::XYZ };
static const gpu::Element COLOR_ELEMENT{ gpu::VEC4, gpu::NUINT8, gpu::RGBA };
static const gpu::Element TRANSFORM_ELEMENT{ gpu::MAT4, gpu::FLOAT, gpu::XYZW };
static std::vector<Transform> transforms;
static std::vector<vec4> colors;
static gpu::BufferPointer indirectBuffer;
static gpu::BufferPointer transformBuffer;
static gpu::BufferPointer colorBuffer;
static gpu::BufferView colorView;
static gpu::BufferView instanceXfmView;
if (!transformBuffer) {
transformBuffer = std::make_shared<gpu::Buffer>();
colorBuffer = std::make_shared<gpu::Buffer>();
indirectBuffer = std::make_shared<gpu::Buffer>();
static const float ITEM_RADIUS = 20;
static const vec3 ITEM_TRANSLATION{ 0, 0, -ITEM_RADIUS };
for (size_t i = 0; i < TYPE_COUNT; ++i) {
GeometryCache::Shape shape = SHAPE[i];
GeometryCache::ShapeData shapeData = geometryCache->_shapes[shape];
{
gpu::Batch::DrawIndexedIndirectCommand indirectCommand;
indirectCommand._count = (uint)shapeData._indexCount;
indirectCommand._instanceCount = ITEM_COUNT;
indirectCommand._baseInstance = (uint)(i * ITEM_COUNT);
indirectCommand._firstIndex = (uint)shapeData._indexOffset / 2;
indirectCommand._baseVertex = 0;
indirectBuffer->append(indirectCommand);
}
//indirectCommand._count
float startingInterval = ITEM_INTERVAL * i;
for (size_t j = 0; j < ITEM_COUNT; ++j) {
float theta = j * SHAPE_INTERVAL + startingInterval;
auto transform = glm::rotate(mat4(), theta, Vectors::UP);
transform = glm::rotate(transform, (randFloat() - 0.5f) * PI / 4.0f, Vectors::UNIT_X);
transform = glm::translate(transform, ITEM_TRANSLATION);
transform = glm::scale(transform, vec3(randFloat() / 2.0f + 0.5f));
transformBuffer->append(transform);
transforms.push_back(transform);
auto color = vec4{ randomColorValue(64), randomColorValue(64), randomColorValue(64), 255 };
color /= 255.0f;
colors.push_back(color);
colorBuffer->append(toCompactColor(color));
}
}
colorView = gpu::BufferView(colorBuffer, COLOR_ELEMENT);
instanceXfmView = gpu::BufferView(transformBuffer, TRANSFORM_ELEMENT);
}
#if 1
GeometryCache::ShapeData shapeData = geometryCache->_shapes[GeometryCache::Icosahedron];
{
batch.setViewTransform(camera);
batch.setModelTransform(Transform());
batch.setPipeline(_pipeline);
batch.setInputFormat(getInstancedSolidStreamFormat());
batch.setInputBuffer(gpu::Stream::COLOR, colorView);
batch.setIndirectBuffer(indirectBuffer);
shapeData.setupBatch(batch);
batch.multiDrawIndexedIndirect(TYPE_COUNT, gpu::TRIANGLES);
}
#else
batch.setViewTransform(camera);
batch.setPipeline(_pipeline);
for (size_t i = 0; i < TYPE_COUNT; ++i) {
GeometryCache::Shape shape = SHAPE[i];
for (size_t j = 0; j < ITEM_COUNT; ++j) {
int index = i * ITEM_COUNT + j;
batch.setModelTransform(transforms[index]);
const vec4& color = colors[index];
batch._glColor4f(color.r, color.g, color.b, 1.0);
geometryCache->renderShape(batch, shape);
}
}
#endif
}
// Render unlit cube + sphere
static auto startUsecs = usecTimestampNow();
float seconds = getSeconds(startUsecs);
seconds /= 4.0f;
int shapeIndex = ((int)seconds) % TYPE_COUNT;
bool wire = (seconds - floorf(seconds) > 0.5f);
batch.setModelTransform(Transform());
batch._glColor4f(0.8f, 0.25f, 0.25f, 1.0f);
if (wire) {
geometryCache->renderWireShape(batch, SHAPE[shapeIndex]);
} else {
geometryCache->renderShape(batch, SHAPE[shapeIndex]);
}
batch.setModelTransform(Transform().setScale(2.05f));
batch._glColor4f(1, 1, 1, 1);
geometryCache->renderWireCube(batch);
_context->render(batch);
_qGlContext.swapBuffers(this);
fps.increment();
if (fps.elapsed() >= 0.5f) {
qDebug() << "FPS: " << fps.rate();
fps.reset();
}
}