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Fixed mirroring of shadows by inverting coordinates instead of blitting framebuffers(performance...).

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This commit is contained in:
Steffen Fündgens 2015-01-23 14:00:26 +01:00
parent 13df9c14a8
commit 8429280aee
3 changed files with 3 additions and 11 deletions
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3
Shader/phong.fsh
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@ -71,7 +71,8 @@ float samplePointShadow(samplerCubeShadow shadowMap, vec3 lightDirection) {
float B = -2*(farPlane*nearPlane)/(farPlane - nearPlane);
float compValue = 0.5*(-A*length(lightDirection) + B)/length(lightDirection) + 0.5;
float bias = 0.005;
return texture(shadowMap, vec4(lightDirection.xyz , compValue - bias));
vec3 vector = vec3(-lightDirection.x, -lightDirection.y, lightDirection.z);
return texture(shadowMap, vec4(vector , compValue - bias));
}
float distanceToBorder(vec2 vector) {

10
graphics.cc
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@ -68,8 +68,6 @@ void Graphics::init(Level* level) {
depthTexture_cube->setWrapS(GL_CLAMP_TO_EDGE);
depthTexture_cube->setWrapT(GL_CLAMP_TO_EDGE);
depthTexture_cube->setCompareMode(GL_COMPARE_REF_TO_TEXTURE);
framebuffer_cube2 = SharedFrameBufferObject(new FrameBufferObject());
framebuffer_cube2->setDepthTexture(depthTexture_cube);
}
GLFWwindow* Graphics::getWindow() {
@ -87,7 +85,7 @@ void Graphics::render()
// render depth textures for point lights
glViewport(0, 0, cube_size, cube_size);
glm::mat4 depthProjectionMatrix_pointlights = glm::perspective(1.571f, (float)cube_size/(float)cube_size, 0.1f, farPlane);
glm::vec3 looking_directions[6] = {glm::vec3(1.0f, 0.0f, 0.0f), glm::vec3(-1.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f),
glm::vec3 looking_directions[6] = {glm::vec3(-1.0f, 0.0f, 0.0f), glm::vec3(1.0f, 0.0f, 0.0f), glm::vec3(0.0f, 1.0f, 0.0f),
glm::vec3(0.0f, -1.0f, 0.0f), glm::vec3(0.0f, 0.0f, 1.0f), glm::vec3(0.0f, 0.0f, -1.0f)};
framebuffer_cube->bind();
@ -103,12 +101,6 @@ void Graphics::render()
glm::mat4 depthViewProjectionMatrix_face = depthProjectionMatrix_pointlights * glm::lookAt(level->getLights()->at(i_pointlight).getPosition(),
level->getLights()->at(i_pointlight).getPosition() + looking_directions[i_face], glm::vec3(0.0f, 1.0f, 0.0f));
level->render(depthShader, false, &depthViewProjectionMatrix_face);
glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer_cube->getObjectName());
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer_cube2->getObjectName());
glBlitFramebuffer(0, 0, cube_size, cube_size, cube_size, cube_size, 0, 0, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer_cube2->getObjectName());
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer_cube->getObjectName());
glBlitFramebuffer(0, 0, cube_size, cube_size, 0, 0, cube_size, cube_size, GL_DEPTH_BUFFER_BIT, GL_NEAREST);
if (!framebuffer_cube->isFrameBufferObjectComplete()) {
printf("Framebuffer incomplete, unknown error occured during shadow generation!\n");
}

1
graphics.hh
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@ -32,7 +32,6 @@ class Graphics {
ACGL::OpenGL::SharedFrameBufferObject framebuffer;
std::vector<ACGL::OpenGL::SharedTextureCubeMap> depth_cubeMaps;
ACGL::OpenGL::SharedFrameBufferObject framebuffer_cube;
ACGL::OpenGL::SharedFrameBufferObject framebuffer_cube2;
ACGL::OpenGL::SharedTexture2D depthTexture_cube;
static const int cube_size;
Level* level;