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Code Issues 156 Wiki Activity

Add screen-space contact shadows for the sun, lamps and headlights

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Hirek
2026-10-17 03:11:47 +02:00
parent c4da5c9867
commit 27e5c07837
8 changed files with 268 additions and 25 deletions
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4
gl/glsl_common.cpp
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@@ -70,6 +70,7 @@ void gl::glsl_common_setup()
"#define CLOUD_DETAIL_TEX " + std::to_string(CLOUD_DETAIL_TEX) + "\n" +
"#define CLOUD_COVERAGE_TEX " + std::to_string(CLOUD_COVERAGE_TEX) + "\n" +
"#define CLOUD_HISTORY_TEX " + std::to_string(CLOUD_HISTORY_TEX) + "\n" +
"#define SCENE_DEPTH_TEX " + std::to_string(SCENE_DEPTH_TEX) + "\n" +
"#define WEATHER_UBO_BINDING " + std::to_string(WEATHER_UBO_BINDING) + "\n" +
"#define WEATHER_SCRATCH_SSBO_BINDING " + std::to_string(WEATHER_SCRATCH_SSBO_BINDING) + "\n" +
"#define MAX_CLOUD_LAYERS " + std::to_string(MAX_CLOUD_LAYERS) + "\n" +
@@ -214,6 +215,9 @@ void gl::glsl_common_setup()
// shadow maps of the headlights, see gl::scene_ubs
mat4 headlight_shadow[MAX_HEADLIGHT_SHADOWS];
vec4 headlight_shadow_params[MAX_HEADLIGHT_SHADOWS];
// contact shadows, see gl::scene_ubs
vec4 contact_shadow_params;
vec4 contact_shadow_lamps;
};
#ifdef STAGE_VERTEX

11
gl/ubo.h
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@@ -75,6 +75,9 @@ namespace gl
const size_t CLOUD_DETAIL_TEX = MAX_TEXTURES + HELPER_TEXTURES + 8;
const size_t CLOUD_COVERAGE_TEX = MAX_TEXTURES + HELPER_TEXTURES + 9;
const size_t CLOUD_HISTORY_TEX = MAX_TEXTURES + HELPER_TEXTURES + 10;
// the depth of the opaque scene of the main view drawn before its colour, resolved, for the contact shadows (light_common.glsl).
// bound directly, like the ones above
const size_t SCENE_DEPTH_TEX = MAX_TEXTURES + HELPER_TEXTURES + 11;
struct scene_ubs
{
@@ -92,9 +95,15 @@ namespace gl
// projector. and x: size of a texel of the map one metre from the projector, y: radius of the filter in texels
glm::mat4 headlight_shadow[MAX_HEADLIGHT_SHADOWS];
glm::vec4 headlight_shadow_params[MAX_HEADLIGHT_SHADOWS];
// contact shadows, read from SCENE_DEPTH_TEX; set only for the colour pass of the main view, zero elsewhere.
// x: length of the rays towards the lights, metres (0: off), y: distance from the camera at which they end, z: steps
// of the ray towards the sun, w: steps of the rays towards lamps and headlights
glm::vec4 contact_shadow_params;
// x: how many lamps and headlights a pixel traces the rays to (0: only the sun), yzw unused
glm::vec4 contact_shadow_lamps;
};
static_assert(sizeof(scene_ubs) == 400 + 80 * MAX_HEADLIGHT_SHADOWS, "bad size of ubs");
static_assert(sizeof(scene_ubs) == 432 + 80 * MAX_HEADLIGHT_SHADOWS, "bad size of ubs");
const size_t MAX_PARAMS = 3;