Hello Carsten, first off, I'm not an expert with textures. First I will show you how I initialize my shadow maps in my plain OpenGL example. So that you understand what I want to map into OpenSG land.
Example: [1] Next the sources I have studied: https://www.khronos.org/opengl/wiki/Framebuffer_Object https://www.khronos.org/opengl/wiki/Geometry_Shader#Layered_rendering https://www.opengl.org/sdk/docs/man/html/glFramebufferTextureLayer.xhtml https://www.opengl.org/sdk/docs/man/html/glFramebufferTexture.xhtml I have reread these articles and I now tend to agree with you wrt to the LayeredTextureBuffer. However, the GL_TEXTURE_CUBE_MAP_ARRAY is missing nevertheless (?) This stuff is not easy to grasp. Most important for me is that I have the OpenSG primitives at hand that I need to translate my plain OpenGL shadow implementation into OpenSG land. Best, Johannes [1] void OpenGLWindow::InitializeShadowFBO() { if (_shadow_casters_point > 0) { glGenTextures(1, &_texture_shadow_array_point_id); glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, _texture_shadow_array_point_id); glTexImage3D( GL_TEXTURE_CUBE_MAP_ARRAY, 0, GL_DEPTH_COMPONENT, SHADOW_WIDTH, SHADOW_HEIGHT, 6 * _shadow_casters_point, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr); glTexParameteri (GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri (GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri (GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri (GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri (GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); for (unsigned int i = 0; i < _shadow_casters_point * 6; i++) { GLuint fbo_id; glGenFramebuffers(1, &fbo_id); glBindFramebuffer(GL_FRAMEBUFFER, fbo_id); glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, _texture_shadow_array_point_id, 0, i); glDrawBuffer(GL_NONE); glReadBuffer(GL_NONE); glBindFramebuffer(GL_FRAMEBUFFER, 0); } glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, 0); } if (_shadow_casters_dir > 0) { glGenTextures(1, &_texture_shadow_array_dir_id); glBindTexture(GL_TEXTURE_2D_ARRAY, _texture_shadow_array_dir_id); glTexImage3D( GL_TEXTURE_2D_ARRAY, 0, GL_DEPTH_COMPONENT, SHADOW_WIDTH, SHADOW_HEIGHT, _shadow_casters_dir, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr); glTexParameteri (GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); glTexParameteri (GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); GLfloat borderColor[] = { 1.0, 1.0, 1.0, 1.0 }; glTexParameterfv(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_BORDER_COLOR, borderColor); glTexParameteri (GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri (GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST); for (unsigned int i = 0; i < _shadow_casters_dir; i++) { GLuint fbo_id; glGenFramebuffers(1, &fbo_id); glBindFramebuffer(GL_FRAMEBUFFER, fbo_id); glFramebufferTextureLayer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, _texture_shadow_array_dir_id, 0, i); glDrawBuffer(GL_NONE); glReadBuffer(GL_NONE); glBindFramebuffer(GL_FRAMEBUFFER, 0); } glBindTexture(GL_TEXTURE_2D_ARRAY, 0); } } ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
