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Converted rendering engine to reverse-z

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TriVoxel
2025-04-29 14:33:13 -06:00
parent 0cdb90bdb8
commit 5b5de92890
16 changed files with 151 additions and 124 deletions
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47
leenkx/Shaders/std/gbuffer.glsl
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@ -1,5 +1,6 @@
#ifndef _GBUFFER_GLSL_
#define _GBUFFER_GLSL_
#include "std/math.glsl"
vec2 octahedronWrap(const vec2 v) {
return (1.0 - abs(v.yx)) * (vec2(v.x >= 0.0 ? 1.0 : -1.0, v.y >= 0.0 ? 1.0 : -1.0));
@ -13,20 +14,17 @@ vec3 getNor(const vec2 enc) {
return n;
}
vec3 getPosView(const vec3 viewRay, const float depth, const vec2 cameraProj) {
float linearDepth = cameraProj.y / (cameraProj.x - depth);
return viewRay * linearDepth;
vec3 getPosView(const vec3 viewRay, float depth, vec2 cameraProj) {
return viewRay * linearize(depth, cameraProj);
}
vec3 getPos(const vec3 eye, const vec3 eyeLook, const vec3 viewRay, const float depth, const vec2 cameraProj) {
float linearDepth = cameraProj.y / ((depth * 0.5 + 0.5) - cameraProj.x);
float viewZDist = dot(eyeLook, viewRay);
vec3 wposition = eye + viewRay * (linearDepth / viewZDist);
return wposition;
vec3 getPos(const vec3 eye, mat3 invV, const vec3 viewRay, float depth, vec2 cameraProj) {
vec3 pVS = viewRay * linearize(depth, cameraProj);
return eye + invV * pVS; // invV == inverse of view-rotation
}
vec3 getPosNoEye(const vec3 eyeLook, const vec3 viewRay, const float depth, const vec2 cameraProj) {
float linearDepth = cameraProj.y / ((depth * 0.5 + 0.5) - cameraProj.x);
float linearDepth = linearize(depth, cameraProj);
float viewZDist = dot(eyeLook, viewRay);
vec3 wposition = viewRay * (linearDepth / viewZDist);
return wposition;
@ -44,28 +42,31 @@ vec3 getPos2(const mat4 invVP, const float depth, const vec2 coord) {
return pos.xyz;
}
#if defined(HLSL) || defined(METAL)
vec3 getPosView2(const mat4 invP, const float depth, vec2 coord) {
coord.y = 1.0 - coord.y;
#else
vec3 getPosView2(const mat4 invP, const float depth, const vec2 coord) {
#endif
//#if defined(HLSL) || defined(METAL)
//vec3 getPosView2(const mat4 invP, const float depth, vec2 coord) {
// coord.y = 1.0 - coord.y;
//#else
vec3 getPosView2(mat4 invP, float depth, vec2 coord) {
vec4 clip = vec4(coord * 2.0 - 1.0, depth, 1.0);
vec4 view = invP * clip;
return view.xyz / view.w;
//#endif
vec4 pos = vec4(coord * 2.0 - 1.0, depth, 1.0);
pos = invP * pos;
pos.xyz /= pos.w;
return pos.xyz;
}
#if defined(HLSL) || defined(METAL)
vec3 getPos2NoEye(const vec3 eye, const mat4 invVP, const float depth, vec2 coord) {
coord.y = 1.0 - coord.y;
#else
// Reconstruct view-space position from inverse View×Proj
vec3 getPos2NoEye(const vec3 eye, const mat4 invVP, const float depth, const vec2 coord) {
vec2 uv = coord;
#if defined(HLSL) || defined(METAL)
uv.y = 1.0 - uv.y;
#endif
vec4 pos = vec4(coord * 2.0 - 1.0, depth, 1.0);
pos = invVP * pos;
pos.xyz /= pos.w;
return pos.xyz - eye;
vec4 clip = vec4(uv * 2.0 - 1.0, depth, 1.0);
vec4 world = invVP * clip;
world.xyz /= world.w;
return world.xyz - eye;
}
// Updated to support separate roughness/metalness storage