mirror of https://github.com/AxioDL/metaforce.git
91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
#include "Runtime/Character/CTimeScaleFunctions.hpp"
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#include <zeus/Math.hpp>
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namespace urde {
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std::unique_ptr<IVaryingAnimationTimeScale> IVaryingAnimationTimeScale::Clone() const { return VClone(); }
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float CConstantAnimationTimeScale::VTimeScaleIntegral(float lowerLimit, float upperLimit) const {
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return (upperLimit - lowerLimit) * x4_scale;
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}
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float CConstantAnimationTimeScale::VFindUpperLimit(float lowerLimit, float root) const {
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return (root / x4_scale) + lowerLimit;
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}
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std::unique_ptr<IVaryingAnimationTimeScale> CConstantAnimationTimeScale::VClone() const {
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return std::make_unique<CConstantAnimationTimeScale>(x4_scale);
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}
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std::unique_ptr<IVaryingAnimationTimeScale> CConstantAnimationTimeScale::VGetFunctionMirrored(float) const {
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return Clone();
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}
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CLinearAnimationTimeScale::CLinearAnimationTimeScale(const CCharAnimTime& t1, float y1, const CCharAnimTime& t2,
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float y2) {
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float y2my1 = y2 - y1;
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float t2mt1 = (t2 - t1).GetSeconds();
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x4_desc.x4_slope = y2my1 / t2mt1;
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x4_desc.x8_yIntercept = y1 - y2my1 / t2mt1 * t1.GetSeconds();
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x4_desc.xc_t1 = t1.GetSeconds();
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x4_desc.x10_t2 = t2.GetSeconds();
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}
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std::unique_ptr<IVaryingAnimationTimeScale>
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CLinearAnimationTimeScale::CFunctionDescription::FunctionMirroredAround(float value) const {
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float slope = -x4_slope;
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float t1 = 2.f * value - x10_t2;
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float t2 = 2.f * value - xc_t1;
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float newYInt = x8_yIntercept - x4_slope * 2.f * value;
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float y1 = slope * t1 + newYInt;
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float y2 = slope * t2 + newYInt;
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return std::make_unique<CLinearAnimationTimeScale>(t1, y1, t2, y2);
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}
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float CLinearAnimationTimeScale::VTimeScaleIntegral(float lowerLimit, float upperLimit) const {
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if (lowerLimit <= upperLimit)
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return TimeScaleIntegralWithSortedLimits(x4_desc, lowerLimit, upperLimit);
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else
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return -TimeScaleIntegralWithSortedLimits(x4_desc, upperLimit, lowerLimit);
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}
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float CLinearAnimationTimeScale::TimeScaleIntegralWithSortedLimits(const CFunctionDescription& desc, float lowerLimit,
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float upperLimit) {
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float lowerEval = desc.x4_slope * lowerLimit + desc.x8_yIntercept;
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float upperEval = desc.x4_slope * upperLimit + desc.x8_yIntercept;
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return (upperLimit - lowerLimit) * 0.5f * (lowerEval + upperEval);
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}
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float CLinearAnimationTimeScale::VFindUpperLimit(float lowerLimit, float root) const {
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return FindUpperLimitFromRoot(x4_desc, lowerLimit, root);
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}
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float CLinearAnimationTimeScale::FindUpperLimitFromRoot(const CFunctionDescription& desc, float lowerLimit,
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float root) {
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float M = 0.5f * desc.x4_slope;
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float upperLimit = lowerLimit;
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float m = 2.f * M;
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float lowerIntegration = M * lowerLimit * lowerLimit + desc.x8_yIntercept * lowerLimit;
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for (int i = 0; i < 16; ++i) {
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float factor = (M * upperLimit * upperLimit + desc.x8_yIntercept * upperLimit - lowerIntegration - root) /
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(m * upperLimit + desc.x8_yIntercept);
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upperLimit -= factor;
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if (zeus::close_enough(factor, 0.f))
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return upperLimit;
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}
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return -1.f;
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}
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std::unique_ptr<IVaryingAnimationTimeScale> CLinearAnimationTimeScale::VClone() const {
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float y1 = x4_desc.x4_slope * x4_desc.xc_t1 + x4_desc.x8_yIntercept;
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float y2 = x4_desc.x4_slope * x4_desc.x10_t2 + x4_desc.x8_yIntercept;
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return std::make_unique<CLinearAnimationTimeScale>(x4_desc.xc_t1, y1, x4_desc.x10_t2, y2);
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}
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std::unique_ptr<IVaryingAnimationTimeScale> CLinearAnimationTimeScale::VGetFunctionMirrored(float value) const {
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return x4_desc.FunctionMirroredAround(value);
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}
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} // namespace urde
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