In this post I wont talk about just a single topic (thats why the title) I will just log some thing I´ve been doing this week.
First, I started to implement deferred in the sponza scene as it will be the next exercise for the university. Right now I implemented the G-buffer generation (with normals,positions and albedo). I also added a "Rect" to debug the content of the G-buffer in the screen.
*The red background is the albedo rect at fullscreen.
It was easier to implement than I thought. Lets see some pseudocode:
// Creation // GBuffer,positions,normals,albedo,depth/stencil ids int id,pid,nid,aid,did; createFbo(id); // positions createTexture(pid); linkTextureFbo(id,pid); // normals createTexture(nid); linkTextureFbo(id,nid); // albedo createTexture(aid); linkTextureFbo(id,aid); // depth stencil // Note that I´m using a render buffer createRenderBuffer(did); linkRenderFbo(id,did); // ... assign color attachments ... // ... check status ... // Done! // Resizing // Just remember to resize all the buffers if the screen size changes! texture(nSize,pid); texture(nSize,nid); texture(nSize,aid); rendertarget(nsize,did);
*OpenGL thing.
Also remember to output the positions,normals and albedo in the fragment shader (using layout(location = x) out vec3 name). And that is basically it for the deferred thing.
I also have been working a lot on the terrain rendering engine in dx12. First I improved a lot the noise generation and moved it to the GPU. I´m using the perlin noise implementation by IQ. I use this noise in a ridged fractal. Now just the visible chunks are sent to the GPU (frustum culling) and finally I´m working on tesselation but I´m having some problems with the normals. Maybe I will make a compute shader that generates a heightmap and then sample it on the other shaders.Here the last video.
Hope you liked it!
