mirror of https://github.com/AxioDL/metaforce.git
98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
#include "Runtime/Graphics/CLight.hpp"
|
|
|
|
#include <cfloat>
|
|
|
|
namespace metaforce {
|
|
|
|
constexpr zeus::CVector3f kDefaultPosition(0.f, 0.f, 0.f);
|
|
constexpr zeus::CVector3f kDefaultDirection(0.f, -1.f, 0.f);
|
|
|
|
float CLight::CalculateLightRadius() const {
|
|
if (FLT_EPSILON > x28_distL && FLT_EPSILON > x2c_distQ) {
|
|
return 0.f;
|
|
}
|
|
|
|
float intensity = GetIntensity();
|
|
if (x2c_distQ <= FLT_EPSILON) {
|
|
constexpr float mulVal = std::min(0.05882353f, 0.2f); // Yes, retro really did do this
|
|
if (x28_distL > FLT_EPSILON) {
|
|
return intensity / (mulVal * x28_distL);
|
|
}
|
|
} else {
|
|
constexpr float mulVal = std::min(0.05882353f, 0.2f); // See above comment
|
|
if (intensity > FLT_EPSILON) {
|
|
return std::sqrt(intensity / (mulVal * x2c_distQ));
|
|
}
|
|
}
|
|
|
|
return 0.f;
|
|
}
|
|
|
|
float CLight::GetIntensity() const {
|
|
if (x4c_24_intensityDirty) {
|
|
x4c_24_intensityDirty = false;
|
|
float coef = 1.f;
|
|
if (x1c_type == ELightType::Custom) {
|
|
coef = x30_angleC;
|
|
}
|
|
x48_cachedIntensity = coef * std::max({x18_color.r(), x18_color.g(), x18_color.b()});
|
|
}
|
|
return x48_cachedIntensity;
|
|
}
|
|
|
|
float CLight::GetRadius() const {
|
|
if (x4c_25_radiusDirty) {
|
|
x44_cachedRadius = CalculateLightRadius();
|
|
x4c_25_radiusDirty = false;
|
|
}
|
|
return x44_cachedRadius;
|
|
}
|
|
|
|
CLight::CLight(const zeus::CVector3f& pos, const zeus::CVector3f& dir, const zeus::CColor& color, float distC,
|
|
float distL, float distQ, float angleC, float angleL, float angleQ)
|
|
: x0_pos(pos)
|
|
, xc_dir(dir)
|
|
, x18_color(color)
|
|
, x24_distC(distC)
|
|
, x28_distL(distL)
|
|
, x2c_distQ(distQ)
|
|
, x30_angleC(angleC)
|
|
, x34_angleL(angleL)
|
|
, x38_angleQ(angleQ) {}
|
|
|
|
CLight::CLight(ELightType type, const zeus::CVector3f& pos, const zeus::CVector3f& dir, const zeus::CColor& color,
|
|
float cutoff)
|
|
: x0_pos(pos), xc_dir(dir), x18_color(color), x1c_type(type), x20_spotCutoff(cutoff) {}
|
|
|
|
zeus::CColor CLight::GetNormalIndependentLightingAtPoint(const zeus::CVector3f& point) const {
|
|
if (x1c_type == ELightType::LocalAmbient)
|
|
return x18_color;
|
|
|
|
float dist = std::max((x0_pos - point).magnitude(), FLT_EPSILON);
|
|
return x18_color * (1.f / (x2c_distQ * dist * dist + x28_distL * dist + x24_distC));
|
|
}
|
|
|
|
CLight CLight::BuildDirectional(const zeus::CVector3f& dir, const zeus::CColor& color) {
|
|
return CLight(ELightType::Directional, kDefaultPosition, dir, color, 180.f);
|
|
}
|
|
|
|
CLight CLight::BuildSpot(const zeus::CVector3f& pos, const zeus::CVector3f& dir, const zeus::CColor& color,
|
|
float angle) {
|
|
return CLight(ELightType::Spot, pos, dir, color, angle);
|
|
}
|
|
|
|
CLight CLight::BuildPoint(const zeus::CVector3f& pos, const zeus::CColor& color) {
|
|
return CLight(ELightType::Point, pos, kDefaultDirection, color, 180.f);
|
|
}
|
|
|
|
CLight CLight::BuildCustom(const zeus::CVector3f& pos, const zeus::CVector3f& dir, const zeus::CColor& color,
|
|
float distC, float distL, float distQ, float angleC, float angleL, float angleQ) {
|
|
return CLight(pos, dir, color, distC, distL, distQ, angleC, angleL, angleQ);
|
|
}
|
|
|
|
CLight CLight::BuildLocalAmbient(const zeus::CVector3f& pos, const zeus::CColor& color) {
|
|
return CLight(ELightType::LocalAmbient, pos, kDefaultDirection, color, 180.f);
|
|
}
|
|
|
|
} // namespace metaforce
|