summaryrefslogtreecommitdiff
path: root/modules/lightmapper_rd
diff options
context:
space:
mode:
Diffstat (limited to 'modules/lightmapper_rd')
-rw-r--r--modules/lightmapper_rd/lightmapper_rd.cpp10
-rw-r--r--modules/lightmapper_rd/lightmapper_rd.h4
-rw-r--r--modules/lightmapper_rd/lm_compute.glsl46
-rw-r--r--modules/lightmapper_rd/register_types.cpp4
-rw-r--r--modules/lightmapper_rd/register_types.h4
5 files changed, 43 insertions, 25 deletions
diff --git a/modules/lightmapper_rd/lightmapper_rd.cpp b/modules/lightmapper_rd/lightmapper_rd.cpp
index 37e969db4d..11715040c2 100644
--- a/modules/lightmapper_rd/lightmapper_rd.cpp
+++ b/modules/lightmapper_rd/lightmapper_rd.cpp
@@ -5,8 +5,8 @@
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
-/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
-/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
@@ -775,11 +775,7 @@ LightmapperRD::BakeError LightmapperRD::bake(BakeQuality p_quality, bool p_use_d
} else {
panorama_tex.instantiate();
panorama_tex->create(8, 8, false, Image::FORMAT_RGBAF);
- for (int i = 0; i < 8; i++) {
- for (int j = 0; j < 8; j++) {
- panorama_tex->set_pixel(i, j, Color(0, 0, 0, 1));
- }
- }
+ panorama_tex->fill(Color(0, 0, 0, 1));
}
RD::TextureFormat tfp;
diff --git a/modules/lightmapper_rd/lightmapper_rd.h b/modules/lightmapper_rd/lightmapper_rd.h
index 51ab60fc29..503f5f7009 100644
--- a/modules/lightmapper_rd/lightmapper_rd.h
+++ b/modules/lightmapper_rd/lightmapper_rd.h
@@ -5,8 +5,8 @@
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
-/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
-/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
diff --git a/modules/lightmapper_rd/lm_compute.glsl b/modules/lightmapper_rd/lm_compute.glsl
index 158cd960c4..7bb8346c47 100644
--- a/modules/lightmapper_rd/lm_compute.glsl
+++ b/modules/lightmapper_rd/lm_compute.glsl
@@ -235,19 +235,39 @@ uint trace_ray(vec3 p_from, vec3 p_to
return RAY_MISS;
}
+// https://www.reedbeta.com/blog/hash-functions-for-gpu-rendering/
+uint hash(uint value) {
+ uint state = value * 747796405u + 2891336453u;
+ uint word = ((state >> ((state >> 28u) + 4u)) ^ state) * 277803737u;
+ return (word >> 22u) ^ word;
+}
+
+uint random_seed(ivec3 seed) {
+ return hash(seed.x ^ hash(seed.y ^ hash(seed.z)));
+}
+
+// generates a random value in range [0.0, 1.0)
+float randomize(inout uint value) {
+ value = hash(value);
+ return float(value / 4294967296.0);
+}
+
const float PI = 3.14159265f;
-const float GOLDEN_ANGLE = PI * (3.0 - sqrt(5.0));
-
-vec3 vogel_hemisphere(uint p_index, uint p_count, float p_offset) {
- float r = sqrt(float(p_index) + 0.5f) / sqrt(float(p_count));
- float theta = float(p_index) * GOLDEN_ANGLE + p_offset;
- float y = cos(r * PI * 0.5);
- float l = sin(r * PI * 0.5);
- return vec3(l * cos(theta), l * sin(theta), y);
+
+// http://www.realtimerendering.com/raytracinggems/unofficial_RayTracingGems_v1.4.pdf (chapter 15)
+vec3 generate_hemisphere_uniform_direction(inout uint noise) {
+ float noise1 = randomize(noise);
+ float noise2 = randomize(noise) * 2.0 * PI;
+
+ float factor = sqrt(1 - (noise1 * noise1));
+ return vec3(factor * cos(noise2), factor * sin(noise2), noise1);
}
-float quick_hash(vec2 pos) {
- return fract(sin(dot(pos * 19.19, vec2(49.5791, 97.413))) * 49831.189237);
+vec3 generate_hemisphere_cosine_weighted_direction(inout uint noise) {
+ float noise1 = randomize(noise);
+ float noise2 = randomize(noise) * 2.0 * PI;
+
+ return vec3(sqrt(noise1) * cos(noise2), sqrt(noise1) * sin(noise2), sqrt(1.0 - noise1));
}
float get_omni_attenuation(float distance, float inv_range, float decay) {
@@ -404,8 +424,9 @@ void main() {
#endif
vec3 light_average = vec3(0.0);
float active_rays = 0.0;
+ uint noise = random_seed(ivec3(params.ray_from, atlas_pos));
for (uint i = params.ray_from; i < params.ray_to; i++) {
- vec3 ray_dir = normal_mat * vogel_hemisphere(i, params.ray_count, quick_hash(vec2(atlas_pos)));
+ vec3 ray_dir = normal_mat * generate_hemisphere_cosine_weighted_direction(noise);
uint tidx;
vec3 barycentric;
@@ -550,8 +571,9 @@ void main() {
vec4(0.0),
vec4(0.0));
+ uint noise = random_seed(ivec3(params.ray_from, probe_index, 49502741 /* some prime */));
for (uint i = params.ray_from; i < params.ray_to; i++) {
- vec3 ray_dir = vogel_hemisphere(i, params.ray_count, quick_hash(vec2(float(probe_index), 0.0)));
+ vec3 ray_dir = generate_hemisphere_uniform_direction(noise);
if (bool(i & 1)) {
//throw to both sides, so alternate them
ray_dir.z *= -1.0;
diff --git a/modules/lightmapper_rd/register_types.cpp b/modules/lightmapper_rd/register_types.cpp
index ae9c5fc390..0a96a86076 100644
--- a/modules/lightmapper_rd/register_types.cpp
+++ b/modules/lightmapper_rd/register_types.cpp
@@ -5,8 +5,8 @@
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
-/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
-/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
diff --git a/modules/lightmapper_rd/register_types.h b/modules/lightmapper_rd/register_types.h
index 622d6e37a7..35a701ce01 100644
--- a/modules/lightmapper_rd/register_types.h
+++ b/modules/lightmapper_rd/register_types.h
@@ -5,8 +5,8 @@
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
-/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
-/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-23 20:25:29 +0000