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Add uniform buffer to LightStage

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This commit is contained in:
Zach Pomerantz 2016-01-14 15:16:05 -08:00
parent 5c1c1e3a3b
commit fad38c0bfb
2 changed files with 32 additions and 7 deletions
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19
libraries/render-utils/src/LightStage.cpp
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@ -16,6 +16,8 @@
LightStage::Shadow::Shadow(model::LightPointer light) : _light{ light}, _frustum{ std::make_shared<ViewFrustum>() } {
framebuffer = gpu::FramebufferPointer(gpu::Framebuffer::createShadowmap(MAP_SIZE));
map = framebuffer->getDepthStencilBuffer();
Schema schema{glm::mat4(), glm::mat4(), 0, MAP_SIZE};
_schemaBuffer = std::make_shared<gpu::Buffer>(sizeof(Schema), (const gpu::Byte*) &schema);
}
void LightStage::Shadow::setKeylightFrustum(ViewFrustum* viewFrustum, float nearDepth, float farDepth) {
@ -36,8 +38,8 @@ void LightStage::Shadow::setKeylightFrustum(ViewFrustum* viewFrustum, float near
// Position the keylight frustum
_frustum->setPosition(viewFrustum->getPosition() - (nearDepth + farDepth)*direction);
_view = _frustum->getView();
const Transform viewInverse{ _view.getInverseMatrix() };
const Transform view{ _frustum->getView()};
const Transform viewInverse{ view.getInverseMatrix() };
viewFrustum->calculate();
auto nearCorners = viewFrustum->getCorners(nearDepth);
@ -67,7 +69,18 @@ void LightStage::Shadow::setKeylightFrustum(ViewFrustum* viewFrustum, float near
glm::mat4 ortho = glm::ortho<float>(min.x, max.x, min.y, max.y, -max.z, -min.z);
_frustum->setProjection(ortho);
_projection = ortho;
// Update the buffer
_schemaBuffer.edit<Schema>().projection = ortho;
_schemaBuffer.edit<Schema>().view = view.getMatrix();
}
const glm::mat4& LightStage::Shadow::getView() const {
return _frustum->getView();
}
const glm::mat4& LightStage::Shadow::getProjection() const {
return _frustum->getProjection();
}
const LightStage::LightPointer LightStage::addLight(model::LightPointer light) {

20
libraries/render-utils/src/LightStage.h
View file

@ -23,6 +23,7 @@ class LightStage {
public:
class Shadow {
public:
using UniformBufferView = gpu::BufferView;
const int MAP_SIZE = 2048;
Shadow(model::LightPointer light);
@ -30,16 +31,27 @@ public:
void setKeylightFrustum(ViewFrustum* viewFrustum, float nearDepth, float farDepth);
const std::shared_ptr<ViewFrustum> getFrustum() const { return _frustum; }
const glm::mat4& getProjection() const { return _projection; }
const Transform& getView() const { return _view; }
const glm::mat4& getView() const;
const glm::mat4& getProjection() const;
const UniformBufferView& getBuffer() const { return _schemaBuffer; }
gpu::FramebufferPointer framebuffer;
gpu::TexturePointer map;
protected:
model::LightPointer _light;
std::shared_ptr<ViewFrustum> _frustum;
glm::mat4 _projection;
Transform _view;
class Schema {
public:
glm::mat4 projection;
glm::mat4 view;
glm::float32 bias;
glm::float32 scale;
};
UniformBufferView _schemaBuffer = nullptr;
};
using ShadowPointer = std::shared_ptr<Shadow>;