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Fixed spotlight math to match GZDoom's

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This commit is contained in:
nashmuhandes 2021-09-25 23:55:29 +08:00
parent aebcfe4342
commit d28ed6b9c8
1 changed files with 2 additions and 2 deletions
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4
src/lightmap/lightmap.cpp
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@ -223,8 +223,8 @@ Vec3 LightmapBuilder::LightTexelSample(const Vec3 &origin, Surface *surface)
float negPitch = -radians(tl->mapThing->pitch);
float xyLen = std::cos(negPitch);
Vec3 spotDir;
spotDir.x = std::sin(radians(tl->mapThing->angle)) * xyLen;
spotDir.y = std::cos(radians(tl->mapThing->angle)) * xyLen;
spotDir.x = -std::cos(radians(tl->mapThing->angle)) * xyLen;
spotDir.y = -std::sin(radians(tl->mapThing->angle)) * xyLen;
spotDir.z = -std::sin(negPitch);
float cosDir = Vec3::Dot(dir, spotDir);
spotAttenuation = smoothstep(tl->outerAngleCos, tl->innerAngleCos, cosDir);