games/learn-opengl
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Have framebuffer mostly working, but light calculations are not there.

Browse source
This commit is contained in:
Zed A. Shaw 2026-09-01 13:20:58 -04:00
parent ea80851450
commit 27e34a18c9
5 changed files with 50 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

1
21-framebuffers/src/scene.cpp
View file

@ -43,6 +43,7 @@ void Scene::render(GLFWwindow* window) {
// framebuffer stuff here
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
glEnable(GL_DEPTH_TEST);
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

29
21-framebuffers/src/scene.hpp
View file

@ -81,22 +81,32 @@ struct Scene {
thing.scale);
}
// screen quadVAO
glGenVertexArrays(1, &quadVAO);
glGenBuffers(1, &quadVBO);
glBindVertexArray(quadVAO);
glBindBuffer(GL_ARRAY_BUFFER, quadVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices), &quadVertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void *)0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)(2 * sizeof(float)));
shader.use();
shader.setInt("texture1", 0);
shader.apply_lighting(light);
screen_shader.use();
screen_shader.setInt("screenTexture", 0);
// framebuffer config
glGenFramebuffers(1, &framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
// framebuffer configuration
// -------------------------
glGenFramebuffers(1, &framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
// create a color attachment texture
glGenTextures(1, &textureColorBuffer);
glBindTexture(GL_TEXTURE_2D, textureColorBuffer);
@ -105,22 +115,15 @@ struct Scene {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureColorBuffer, 0);
// create renderbuffer object for depth and stencil attachment
// create a renderbuffer object for depth and stencil attachment (we won't be sampling these)
glGenRenderbuffers(1, &rbo);
glBindRenderbuffer(GL_RENDERBUFFER, rbo);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, SCR_WIDTH, SCR_HEIGHT);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rbo);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, SCR_WIDTH, SCR_HEIGHT); // use a single renderbuffer object for both a depth AND stencil buffer.
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rbo); // now actually attach it
// now that we actually created the framebuffer and added all attachments we want to check if it is actually complete now
dbc::check(glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE, "Frame buffer not complete.");
glBindFramebuffer(GL_FRAMEBUFFER, 0);
shader.use();
shader.apply_lighting(light);
screen_shader.use();
screen_shader.setInt("screenTexture", 0);
}
void update();