AstralTransRocketries/Cubyz
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Fix the value range of the floating point depth buffer.

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Now I can make the near plane tiny without causing any z-fighting.
This commit is contained in:
IntegratedQuantum 2023-08-28 21:17:11 +02:00
parent 4327a50c5e
commit c38b987a01
3 changed files with 10 additions and 7 deletions
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2
src/main.zig
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@ -714,6 +714,8 @@ pub fn main() !void {
c.glCullFace(c.GL_BACK);
c.glEnable(c.GL_BLEND);
c.glClipControl(c.GL_LOWER_LEFT, c.GL_ZERO_TO_ONE);
c.glDepthFunc(c.GL_GREATER);
c.glBlendFunc(c.GL_SRC_ALPHA, c.GL_ONE_MINUS_SRC_ALPHA);
Window.GLFWCallbacks.framebufferSize(undefined, Window.width, Window.height);
var lastTime = std.time.nanoTimestamp();

7
src/renderer.zig
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@ -28,7 +28,7 @@ const Mat4f = vec.Mat4f;
/// The number of milliseconds after which no more chunk meshes are created. This allows the game to run smoother on movement.
const maximumMeshTime = 12;
const zNear = 0.1; // TODO: Handle closer surfaces in a special function.
const zNear = 1e-10;
var fogShader: graphics.Shader = undefined;
var fogUniforms: struct {
@ -131,6 +131,7 @@ pub fn renderWorld(world: *World, ambientLight: Vec3f, skyColor: Vec3f, playerPo
_ = world;
worldFrameBuffer.bind();
gpu_performance_measuring.startQuery(.clear);
c.glClearDepth(0.0);
worldFrameBuffer.clear(Vec4f{skyColor[0], skyColor[1], skyColor[2], 1});
gpu_performance_measuring.stopQuery();
game.camera.updateViewMatrix();
@ -203,7 +204,7 @@ pub fn renderWorld(world: *World, ambientLight: Vec3f, skyColor: Vec3f, playerPo
c.glUniform1f(chunk.meshing.transparentUniforms.@"waterFog.density", waterFog.density);
c.glBlendFunc(c.GL_SRC_ALPHA, c.GL_SRC1_COLOR);
c.glDepthFunc(c.GL_LEQUAL);
c.glDepthFunc(c.GL_GEQUAL);
c.glDepthMask(c.GL_FALSE);
{
var i: usize = meshes.len;
@ -214,7 +215,7 @@ pub fn renderWorld(world: *World, ambientLight: Vec3f, skyColor: Vec3f, playerPo
}
}
c.glDepthMask(c.GL_TRUE);
c.glDepthFunc(c.GL_LESS);
c.glDepthFunc(c.GL_GREATER);
c.glBlendFunc(c.GL_SRC_ALPHA, c.GL_ONE_MINUS_SRC_ALPHA);
gpu_performance_measuring.stopQuery();
// NormalChunkMesh.bindTransparentShader(ambientLight, directionalLight.getDirection(), time);

8
src/vec.zig
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@ -175,10 +175,10 @@ pub const Mat4f = struct {
const tanX = aspect*tanY;
return Mat4f { // Taken from https://chaosinmotion.com/2010/09/06/goodbye-far-clipping-plane/
.columns = [4]Vec4f { // Keep in mind that this is the transpose!
Vec4f{1/tanX, 0, 0, 0},
Vec4f{0, 1/tanY, 0, 0},
Vec4f{0, 0, 0, -1},
Vec4f{0, 0, -near, 0},
Vec4f{1/tanX, 0, 0, 0},
Vec4f{0, 1/tanY, 0, 0},
Vec4f{0, 0, 0, -1},
Vec4f{0, 0, near, 0},
}
};
}