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support multiple shadowers (up to 10)

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This commit is contained in:
Joakim Kilby
2023-10-17 10:11:42 +02:00
parent 58d402fc67
commit cd4f2dce39
4 changed files with 34 additions and 17 deletions
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3
modules/globebrowsing/shaders/globalrenderer_vs.glsl
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@@ -100,7 +100,8 @@ vec3 getLevelWeights(float distToVertexOnEllipsoid) {
);
}
out vec4 position_lightspace;
const int n_depthmaps = 10;
out vec4 positions_lightspace[n_depthmaps];
void main() {
PositionNormalPair pair = globalInterpolation(in_uv);

9
modules/globebrowsing/shaders/localrenderer_vs.glsl
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@@ -67,9 +67,10 @@ uniform float chunkMinHeight;
uniform float distanceScaleFactor;
uniform int chunkLevel;
const int n_depthmaps = 10;
uniform dmat4 inv_vp;
uniform dmat4 light_vp;
out vec4 position_lightspace;
uniform dmat4 light_vps[n_depthmaps];
out vec4 positions_lightspace[n_depthmaps];
vec3 bilinearInterpolation(vec2 uv) {
@@ -131,5 +132,7 @@ void main() {
shadowCoords = vec4(shadowMatrix * dvec4(p, 1.0));
#endif // SHADOW_MAPPING_ENABLED
position_lightspace = vec4(light_vp * (inv_vp * dvec4(p, 1.0)));
for (int idx = 0; idx < n_depthmaps; ++idx) {
positions_lightspace[idx] = vec4(light_vps[idx] * (inv_vp * dvec4(p, 1.0)));
}
}

21
modules/globebrowsing/shaders/renderer_fs.glsl
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@@ -154,8 +154,9 @@ in vec3 positionWorldSpace;
uniform float opacity;
in vec4 position_lightspace;
uniform sampler2D light_depth_map;
const int n_depthmaps = 10;
in vec4 positions_lightspace[n_depthmaps];
uniform sampler2D light_depth_maps[n_depthmaps];
Fragment getFragment() {
Fragment frag;
@@ -294,12 +295,18 @@ Fragment getFragment() {
frag.color.xyz *= shadow < 0.99 ? clamp(shadow + 0.3, 0.0, 1.0) : shadow;
#endif
vec3 coords = position_lightspace.xyz / position_lightspace.w;
coords = coords * 0.5 + 0.5;
float sampled_depth = texture(light_depth_map, coords.xy).r;
float current_depth = coords.z;
bool shadowed = false;
for (int idx = 0; idx < n_depthmaps; ++idx) {
vec3 coords = positions_lightspace[idx].xyz / positions_lightspace[idx].w;
coords = coords * 0.5 + 0.5;
float sampled_depth = texture(light_depth_maps[idx], coords.xy).r;
float current_depth = coords.z;
if (current_depth > sampled_depth) {
shadowed = true;
}
}
if (current_depth > sampled_depth) {
if (shadowed) {
frag.color.xyz *= 0.1;
}

18
modules/globebrowsing/src/renderableglobe.cpp
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@@ -1643,16 +1643,22 @@ void RenderableGlobe::renderChunkLocally(const Chunk& chunk, const RenderData& d
program.setUniform("shadowMapTexture", shadowMapUnit);
}
if (depthMapData.size() > 0) {
_localRenderer.program->setUniform("light_vp", depthMapData[0].viewProjecion);
_localRenderer.program->setUniform("inv_vp", glm::inverse(data.camera.combinedViewMatrix()));
ghoul::opengl::TextureUnit depthmapUnit;
depthmapUnit.activate();
std::vector<glm::dmat4> light_vps;
std::vector<GLint> depthmaps;
for (const RenderableModel::DepthMapData& data : depthMapData) {
light_vps.push_back(data.viewProjecion);
ghoul::opengl::TextureUnit unit;
depthmaps.push_back(unit);
unit.activate();
glBindTexture(GL_TEXTURE_2D, depthMapData[0].depthMap);
_localRenderer.program->setUniform("light_depth_map", depthmapUnit);
}
_localRenderer.program->setUniform("inv_vp", glm::inverse(data.camera.combinedViewMatrix()));
_localRenderer.program->setUniform("light_depth_maps", depthmaps);
GLint loc = glGetUniformLocation(*_localRenderer.program, "light_vps");
glUniformMatrix4dv(loc, light_vps.size(), GL_FALSE, glm::value_ptr(light_vps.front()));
glEnable(GL_DEPTH_TEST);
if (!renderGeomOnly) {
glEnable(GL_CULL_FACE);