mirror of https://github.com/AxioDL/metaforce.git
128 lines
3.9 KiB
C++
128 lines
3.9 KiB
C++
#include "CLight.hpp"
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#include <cfloat>
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namespace urde
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{
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static const zeus::CVector3f kDefaultPosition(0.f, 0.f, 0.f);
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static const zeus::CVector3f kDefaultDirection(0.f, -1.f, 0.f);
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float CLight::CalculateLightRadius() const
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{
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if (x28_distL < FLT_EPSILON && x2c_distQ < FLT_EPSILON)
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return FLT_MAX;
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float intens = GetIntensity();
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if (x2c_distQ > FLT_EPSILON)
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{
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if (intens <= FLT_EPSILON)
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return 0.f;
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return std::sqrt(intens / 5.f * intens / 255.f * x2c_distQ);
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}
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float nextIntens = 5.f * intens / 255.f;
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return intens / std::min(0.2f, nextIntens) * x28_distL;
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}
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float CLight::GetIntensity() const
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{
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if (x4c_24_intensityDirty)
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{
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const_cast<CLight*>(this)->x4c_24_intensityDirty = false;
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float coef = 1.f;
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if (x1c_type == ELightType::Custom)
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coef = x30_angleC;
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const_cast<CLight*>(this)->x48_cachedIntensity =
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coef * std::max(x18_color.r, std::max(x18_color.g, x18_color.b));
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}
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return x48_cachedIntensity;
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}
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CLight::CLight(const zeus::CVector3f& pos,
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const zeus::CVector3f& dir,
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const zeus::CColor& color,
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float distC, float distL, float distQ,
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float angleC, float angleL, float angleQ)
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: x0_pos(pos), xc_dir(dir), x18_color(color),
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x1c_type(ELightType::Custom), x20_spotCutoff(0.f),
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x24_distC(distC), x28_distL(distL), x2c_distQ(distQ),
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x30_angleC(angleC), x34_angleL(angleL), x38_angleQ(angleQ),
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x44_cachedRadius(0.f), x48_cachedIntensity(0.f),
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x4c_24_intensityDirty(true), x4c_25_radiusDirty(true)
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{}
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CLight::CLight(ELightType type,
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const zeus::CVector3f& pos,
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const zeus::CVector3f& dir,
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const zeus::CColor& color,
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float cutoff)
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: x0_pos(pos), xc_dir(dir), x18_color(color),
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x1c_type(type), x20_spotCutoff(cutoff),
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x24_distC(1.f), x28_distL(0.f), x2c_distQ(0.f),
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x30_angleC(1.f), x34_angleL(0.f), x38_angleQ(0.f),
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x44_cachedRadius(0.f), x48_cachedIntensity(0.f),
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x4c_24_intensityDirty(true), x4c_25_radiusDirty(true)
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{
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switch (type)
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{
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case ELightType::Spot:
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{
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float cosCutoff = std::cos(zeus::degToRad(cutoff));
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x30_angleC = 0.f;
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x34_angleL = -cosCutoff / (1.0 - cosCutoff);
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x38_angleQ = 1.f / (1.0 - cosCutoff);
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break;
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}
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case ELightType::Directional:
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{
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x24_distC = 1.f;
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x28_distL = 0.f;
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x2c_distQ = 0.f;
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break;
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}
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default: break;
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}
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}
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zeus::CColor CLight::GetNormalIndependentLightingAtPoint(const zeus::CVector3f& point) const
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{
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if (x1c_type == ELightType::LocalAmbient)
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return x18_color;
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float dist = std::max((x0_pos - point).magnitude(), FLT_EPSILON);
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return x18_color * (1.f / (x2c_distQ * dist * dist + x28_distL * dist + x24_distC));
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}
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CLight CLight::BuildDirectional(const zeus::CVector3f& dir, const zeus::CColor& color)
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{
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return CLight(ELightType::Directional, kDefaultPosition, dir, color, 180.f);
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}
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CLight CLight::BuildSpot(const zeus::CVector3f& pos, const zeus::CVector3f& dir,
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const zeus::CColor& color, float angle)
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{
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return CLight(ELightType::Spot, pos, dir, color, angle);
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}
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CLight CLight::BuildPoint(const zeus::CVector3f& pos, const zeus::CColor& color)
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{
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return CLight(ELightType::Point, pos, kDefaultDirection, color, 180.f);
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}
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CLight CLight::BuildCustom(const zeus::CVector3f& pos, const zeus::CVector3f& dir,
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const zeus::CColor& color,
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float distC, float distL, float distQ,
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float angleC, float angleL, float angleQ)
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{
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return CLight(pos, dir, color, distC, distL, distQ, angleC, angleL, angleQ);
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}
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CLight CLight::BuildLocalAmbient(const zeus::CVector3f& pos, const zeus::CColor& color)
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{
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return CLight(ELightType::LocalAmbient, pos, kDefaultDirection, color, 180.f);
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}
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}
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