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Final version with volume depth interpolation.

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This commit is contained in:
Jonathas Costa
2019-11-26 11:06:39 -05:00
parent aaa73415e9
commit 60813e3209
4 changed files with 64 additions and 7 deletions
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60
src/rendering/framebufferrenderer.cpp
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@@ -59,8 +59,8 @@ namespace {
"renderedTexture", "inverseScreenSize"
};
constexpr const std::array<const char*, 1> DownscaledVolumeUniformNames = {
"downscaledRenderedVolume"
constexpr const std::array<const char*, 2> DownscaledVolumeUniformNames = {
"downscaledRenderedVolume", "downscaledRenderedVolumeDepth"
};
constexpr const char* ExitFragmentShaderPath =
@@ -191,6 +191,7 @@ void FramebufferRenderer::initialize() {
// DownscaleVolumeRendering
glGenFramebuffers(1, &_downscaleVolumeRendering.framebuffer);
glGenTextures(1, &_downscaleVolumeRendering.colorTexture);
glGenTextures(1, &_downscaleVolumeRendering.depthbuffer);
// Allocate Textures/Buffers Memory
updateResolution();
@@ -325,6 +326,12 @@ void FramebufferRenderer::initialize() {
_downscaleVolumeRendering.colorTexture,
0
);
glFramebufferTexture(
GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT,
_downscaleVolumeRendering.depthbuffer,
0
);
status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE) {
@@ -383,6 +390,7 @@ void FramebufferRenderer::deinitialize() {
glDeleteTextures(1, &_gBuffers.positionTexture);
glDeleteTextures(1, &_gBuffers.normalTexture);
glDeleteTextures(1, &_downscaleVolumeRendering.colorTexture);
glDeleteTextures(1, &_downscaleVolumeRendering.depthbuffer);
glDeleteTextures(1, &_pingPongBuffers.colorTexture[1]);
@@ -492,7 +500,7 @@ void FramebufferRenderer::applyFXAA() {
_fxaaProgram->deactivate();
}
void FramebufferRenderer::updateDownscaleColorTexture() {
void FramebufferRenderer::updateDownscaleTextures() {
glBindTexture(GL_TEXTURE_2D, _downscaleVolumeRendering.colorTexture);
glTexImage2D(
GL_TEXTURE_2D,
@@ -507,6 +515,23 @@ void FramebufferRenderer::updateDownscaleColorTexture() {
);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
float volumeBorderColor[] = { 0.0f, 0.0f, 0.0f, 1.0f };
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, volumeBorderColor);
glBindTexture(GL_TEXTURE_2D, _downscaleVolumeRendering.depthbuffer);
glTexImage2D(
GL_TEXTURE_2D,
0,
GL_DEPTH_COMPONENT32F,
_resolution.x * _downscaleVolumeRendering.currentDownscaleFactor,
_resolution.y * _downscaleVolumeRendering.currentDownscaleFactor,
0,
GL_DEPTH_COMPONENT,
GL_FLOAT,
nullptr
);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
void FramebufferRenderer::writeDownscaledVolume() {
@@ -557,6 +582,19 @@ void FramebufferRenderer::writeDownscaledVolume() {
downscaledTextureUnit
);
ghoul::opengl::TextureUnit downscaledDepthUnit;
downscaledDepthUnit.activate();
glBindTexture(
GL_TEXTURE_2D,
_downscaleVolumeRendering.depthbuffer
);
_downscaledVolumeProgram->setUniform(
_writeDownscaledVolumeUniformCache.downscaledRenderedVolumeDepth,
downscaledDepthUnit
);
glEnablei(GL_BLEND, 0);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
@@ -800,6 +838,20 @@ void FramebufferRenderer::updateResolution() {
float volumeBorderColor[] = { 0.0f, 0.0f, 0.0f, 1.0f };
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, volumeBorderColor);
glBindTexture(GL_TEXTURE_2D, _downscaleVolumeRendering.depthbuffer);
glTexImage2D(
GL_TEXTURE_2D,
0,
GL_DEPTH_COMPONENT32F,
_resolution.x * _downscaleVolumeRendering.currentDownscaleFactor,
_resolution.y * _downscaleVolumeRendering.currentDownscaleFactor,
0,
GL_DEPTH_COMPONENT,
GL_FLOAT,
nullptr
);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Volume Rendering Textures
glBindTexture(GL_TEXTURE_2D, _exitColorTexture);
@@ -1126,7 +1178,7 @@ void FramebufferRenderer::performRaycasterTasks(const std::vector<RaycasterTask>
glViewport(0, 0, _resolution.x * scaleDown, _resolution.y * scaleDown);
if (_downscaleVolumeRendering.currentDownscaleFactor != scaleDown) {
_downscaleVolumeRendering.currentDownscaleFactor = scaleDown;
updateDownscaleColorTexture();
updateDownscaleTextures();
}
glClear(GL_COLOR_BUFFER_BIT);
}