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Refactored light direction calculation.

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This commit is contained in:
LJW-Dev
2026-03-16 15:25:27 +08:00
committed by Jan Laupetin
parent 60060e9a7a
commit ed4c16251a
1 changed files with 11 additions and 25 deletions
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src/ObjLoading/Game/T6/BSP/BSPCreator.cpp
+11 -25
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@@ -335,29 +335,13 @@ namespace
m_bsp->lights[lightIndex].pos = vec3_t{transformedPosition.x(), transformedPosition.y(), transformedPosition.z()};
RhcToLhcCoordinates(m_bsp->lights[lightIndex].pos.v);
// BO2 uses -Z up and the default light direction is straight down
Eigen::Vector3f defaultDirection(0.0f, 0.0f, 1.0f);
Eigen::Vector3f outputDirection;
if (node.rotation)
{
Eigen::Quaternionf rotationQuat(
(*node.rotation)[3], (*node.rotation)[0], (*node.rotation)[1], (*node.rotation)[2]); // GLTF is XYZW, Eigen is WXYZ
outputDirection = rotationQuat * defaultDirection;
}
else if (node.matrix)
{
con::error("matrix rotation unimpelemted");
assert(false);
// Eigen::Quaternionf rotationQuat;
// rotationQuat = nodeMatrix;
// outputDirection = rotationQuat * defaultDirection;
}
else
outputDirection = defaultDirection;
// GLTF spec uses +Y up and the default light direction is straight down
Eigen::Vector3f defaultDirection(0.0f, -1.0f, 0.0f);
Eigen::Affine3f affineTransform(nodeMatrix);
Eigen::Matrix3f rotationMatrix = affineTransform.rotation();
Eigen::Vector3f outputDirection = rotationMatrix * defaultDirection;
outputDirection.normalize();
m_bsp->lights[lightIndex].direction = vec3_t{outputDirection.x(), outputDirection.y(), outputDirection.z()};
RhcToLhcCoordinates(m_bsp->lights[lightIndex].direction.v);
m_bsp->lights[lightIndex].hasPosBeenSet = true;
@@ -399,6 +383,8 @@ namespace
return true;
}
}
return false;
}
static std::vector<unsigned> GetRootNodes(const JsonRoot& jRoot)
@@ -533,12 +519,12 @@ namespace
}
if (!jsLight.intensity)
light.intensity = 100000.0f; // adjusted from GLTF spec to better match BO2
light.intensity = 100000.0f; // adjusted from spec to better match BO2
else
light.intensity = *jsLight.intensity;
if (!jsLight.range)
light.range = 1000.0f; // adjusted from GLTF spec to better match BO2
light.range = 1000.0f; // adjusted from spec to better match BO2
else
light.range = *jsLight.range;
@@ -553,15 +539,15 @@ namespace
else // JsonPunctualLightType::SPOT
{
light.type = LIGHT_TYPE_SPOT;
assert(jsLight.spot);
assert(jsLight.spot);
if (!jsLight.spot->innerConeAngle)
light.innerConeAngle = 0.0f;
else
light.innerConeAngle = *jsLight.spot->innerConeAngle;
if (!jsLight.spot->outerConeAngle)
light.outerConeAngle = 3.14159265359f / 4.0f; /// 45 degrees
light.outerConeAngle = 3.14159265359f / 4.0f; /// spec of 45 degrees
else
light.outerConeAngle = *jsLight.spot->outerConeAngle;
}