AnimConstraintStack.h

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#pragma once
#include "common/Export.h"
 
 
#include <vector>
 
namespace eve::animation {
 
class AnimPose;
class AnimSkeleton;
 
class EVENGINE_API_WORLD AnimConstraintStack {
public:
    explicit AnimConstraintStack(AnimSkeleton* skeleton);
    AnimConstraintStack(const AnimConstraintStack&)            = default;
    AnimConstraintStack& operator=(const AnimConstraintStack&) = default;
 
    void setSkeleton(AnimSkeleton* skeleton);
    AnimSkeleton* getSkeleton() const { return skeleton_; }
 
    void clear() { constraints_.clear(); }
    int getCount() const { return static_cast<int>(constraints_.size()); }
    void addAim(int bone, float targetX, float targetY, float targetZ, float weight = 1.f);
    void addTwoBoneIK(int root, int mid, int tip, float targetX, float targetY, float targetZ,
                      float weight = 1.f);
    void addFootIK(int hip, int knee, int foot, float groundY, float normalX = 0.f, float normalY = 1.f,
                   float normalZ = 0.f, float soleOffset = 0.f, float weight = 1.f);
    void apply(AnimPose* pose) const;
 
private:
    enum class Type { Aim, TwoBone, Foot };
    struct Constraint {
        Type type = Type::Aim;
        int a = -1, b = -1, c = -1;
        float x = 0.f, y = 0.f, z = 0.f;
        float nx = 0.f, ny = 1.f, nz = 0.f;
        float offset = 0.f, weight = 1.f;
    };
    AnimSkeleton* skeleton_ = nullptr;
    std::vector<Constraint> constraints_;
};
 
}  // namespace eve::animation