void ApplicationCompositor::drawSphereSection(gpu::Batch& batch) {
buildHemiVertices(_textureFov, _textureAspectRatio, 80, 80);
static const int VERTEX_DATA_SLOT = 0;
static const int TEXTURE_DATA_SLOT = 1;
static const int COLOR_DATA_SLOT = 2;
gpu::Stream::FormatPointer streamFormat(new gpu::Stream::Format()); // 1 for everyone
streamFormat->setAttribute(gpu::Stream::POSITION, VERTEX_DATA_SLOT, gpu::Element(gpu::VEC3, gpu::FLOAT, gpu::XYZ), 0);
streamFormat->setAttribute(gpu::Stream::TEXCOORD, TEXTURE_DATA_SLOT, gpu::Element(gpu::VEC2, gpu::FLOAT, gpu::UV));
streamFormat->setAttribute(gpu::Stream::COLOR, COLOR_DATA_SLOT, gpu::Element(gpu::VEC4, gpu::FLOAT, gpu::RGBA));
batch.setInputFormat(streamFormat);
static const int VERTEX_STRIDE = sizeof(vec3) + sizeof(vec2) + sizeof(vec4);
gpu::BufferView posView(_hemiVertices, 0, _hemiVertices->getSize(), VERTEX_STRIDE, streamFormat->getAttributes().at(gpu::Stream::POSITION)._element);
gpu::BufferView uvView(_hemiVertices, sizeof(vec3), _hemiVertices->getSize(), VERTEX_STRIDE, streamFormat->getAttributes().at(gpu::Stream::TEXCOORD)._element);
gpu::BufferView colView(_hemiVertices, sizeof(vec3) + sizeof(vec2), _hemiVertices->getSize(), VERTEX_STRIDE, streamFormat->getAttributes().at(gpu::Stream::COLOR)._element);
batch.setInputBuffer(VERTEX_DATA_SLOT, posView);
batch.setInputBuffer(TEXTURE_DATA_SLOT, uvView);
batch.setInputBuffer(COLOR_DATA_SLOT, colView);
batch.setIndexBuffer(gpu::UINT16, _hemiIndices, 0);
batch.drawIndexed(gpu::TRIANGLES, _hemiIndexCount);
}
void Skybox::render(gpu::Batch& batch, const ViewFrustum& viewFrustum, const Skybox& skybox) {
if (skybox.getCubemap() && skybox.getCubemap()->isDefined()) {
static gpu::PipelinePointer thePipeline;
static gpu::BufferPointer theBuffer;
static gpu::Stream::FormatPointer theFormat;
static gpu::BufferPointer theConstants;
int SKYBOX_CONSTANTS_SLOT = 0; // need to be defined by the compilation of the shader
if (!thePipeline) {
auto skyVS = gpu::ShaderPointer(gpu::Shader::createVertex(std::string(Skybox_vert)));
auto skyFS = gpu::ShaderPointer(gpu::Shader::createPixel(std::string(Skybox_frag)));
auto skyShader = gpu::ShaderPointer(gpu::Shader::createProgram(skyVS, skyFS));
gpu::Shader::BindingSet bindings;
bindings.insert(gpu::Shader::Binding(std::string("cubeMap"), 0));
if (!gpu::Shader::makeProgram(*skyShader, bindings)) {
}
SKYBOX_CONSTANTS_SLOT = skyShader->getBuffers().findLocation("skyboxBuffer");
if (SKYBOX_CONSTANTS_SLOT == gpu::Shader::INVALID_LOCATION) {
SKYBOX_CONSTANTS_SLOT = skyShader->getUniforms().findLocation("skyboxBuffer");
}
auto skyState = gpu::StatePointer(new gpu::State());
thePipeline = gpu::PipelinePointer(gpu::Pipeline::create(skyShader, skyState));
const float CLIP = 1.0;
const glm::vec2 vertices[4] = { {-CLIP, -CLIP}, {CLIP, -CLIP}, {-CLIP, CLIP}, {CLIP, CLIP}};
theBuffer.reset(new gpu::Buffer(sizeof(vertices), (const gpu::Byte*) vertices));
theFormat.reset(new gpu::Stream::Format());
theFormat->setAttribute(gpu::Stream::POSITION, gpu::Stream::POSITION, gpu::Element(gpu::VEC2, gpu::FLOAT, gpu::XYZ));
auto color = glm::vec4(1.0f);
theConstants.reset(new gpu::Buffer(sizeof(color), (const gpu::Byte*) &color));
}
glm::mat4 projMat;
viewFrustum.evalProjectionMatrix(projMat);
Transform viewTransform;
viewFrustum.evalViewTransform(viewTransform);
if (glm::all(glm::equal(skybox.getColor(), glm::vec3(0.0f)))) {
auto color = glm::vec4(1.0f);
theConstants->setSubData(0, sizeof(color), (const gpu::Byte*) &color);
} else {
theConstants->setSubData(0, sizeof(Color), (const gpu::Byte*) &skybox.getColor());
}
batch.setProjectionTransform(projMat);
batch.setViewTransform(viewTransform);
batch.setModelTransform(Transform()); // only for Mac
batch.setPipeline(thePipeline);
batch.setInputBuffer(gpu::Stream::POSITION, theBuffer, 0, 8);
batch.setUniformBuffer(SKYBOX_CONSTANTS_SLOT, theConstants, 0, theConstants->getSize());
batch.setInputFormat(theFormat);
batch.setUniformTexture(0, skybox.getCubemap());
batch.draw(gpu::TRIANGLE_STRIP, 4);
} else {
// skybox has no cubemap, just clear the color buffer
auto color = skybox.getColor();
batch.clearFramebuffer(gpu::Framebuffer::BUFFER_COLOR0, glm::vec4(skybox.getColor(),1.0f), 0.f, 0);
}
}
void ApplicationCompositor::buildHemiVertices(
const float fov, const float aspectRatio, const int slices, const int stacks) {
static float textureFOV = 0.0f, textureAspectRatio = 1.0f;
if (textureFOV == fov && textureAspectRatio == aspectRatio) {
return;
}
textureFOV = fov;
textureAspectRatio = aspectRatio;
auto geometryCache = DependencyManager::get<GeometryCache>();
_hemiVertices = gpu::BufferPointer(new gpu::Buffer());
_hemiIndices = gpu::BufferPointer(new gpu::Buffer());
if (fov >= PI) {
qDebug() << "TexturedHemisphere::buildVBO(): FOV greater or equal than Pi will create issues";
}
//UV mapping source: http://www.mvps.org/directx/articles/spheremap.htm
vec3 pos;
vec2 uv;
// Compute vertices positions and texture UV coordinate
// Create and write to buffer
for (int i = 0; i < stacks; i++) {
uv.y = (float)i / (float)(stacks - 1); // First stack is 0.0f, last stack is 1.0f
// abs(theta) <= fov / 2.0f
float pitch = -fov * (uv.y - 0.5f);
for (int j = 0; j < slices; j++) {
uv.x = (float)j / (float)(slices - 1); // First slice is 0.0f, last slice is 1.0f
// abs(phi) <= fov * aspectRatio / 2.0f
float yaw = -fov * aspectRatio * (uv.x - 0.5f);
pos = getPoint(yaw, pitch);
static const vec4 color(1);
_hemiVertices->append(sizeof(pos), (gpu::Byte*)&pos);
_hemiVertices->append(sizeof(vec2), (gpu::Byte*)&uv);
_hemiVertices->append(sizeof(vec4), (gpu::Byte*)&color);
}
}
// Compute number of indices needed
static const int VERTEX_PER_TRANGLE = 3;
static const int TRIANGLE_PER_RECTANGLE = 2;
int numberOfRectangles = (slices - 1) * (stacks - 1);
_hemiIndexCount = numberOfRectangles * TRIANGLE_PER_RECTANGLE * VERTEX_PER_TRANGLE;
// Compute indices order
std::vector<GLushort> indices;
for (int i = 0; i < stacks - 1; i++) {
for (int j = 0; j < slices - 1; j++) {
GLushort bottomLeftIndex = i * slices + j;
GLushort bottomRightIndex = bottomLeftIndex + 1;
GLushort topLeftIndex = bottomLeftIndex + slices;
GLushort topRightIndex = topLeftIndex + 1;
// FIXME make a z-order curve for better vertex cache locality
indices.push_back(topLeftIndex);
indices.push_back(bottomLeftIndex);
indices.push_back(topRightIndex);
indices.push_back(topRightIndex);
indices.push_back(bottomLeftIndex);
indices.push_back(bottomRightIndex);
}
}
_hemiIndices->append(sizeof(GLushort) * indices.size(), (gpu::Byte*)&indices[0]);
}
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();
}
}