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58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
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#include "common.h"
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#include "patcher.h"
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#include "Quaternion.h"
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// TODO: move more stuff into here
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void
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CQuaternion::Slerp(const CQuaternion &q1, const CQuaternion &q2, float theta, float invSin, float t)
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{
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if(theta == 0.0f)
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*this = q2;
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else{
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float w1, w2;
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if(theta > PI/2){
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theta = PI - theta;
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w1 = sin((1.0f - t) * theta) * invSin;
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w2 = -sin(t * theta) * invSin;
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}else{
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w1 = sin((1.0f - t) * theta) * invSin;
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w2 = sin(t * theta) * invSin;
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}
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*this = w1*q1 + w2*q2;
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}
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}
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void
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CQuaternion::Get(RwMatrix *matrix)
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{
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float x2 = x+x;
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float y2 = y+y;
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float z2 = z+z;
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float x_2x = x * x2;
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float x_2y = x * y2;
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float x_2z = x * z2;
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float y_2y = y * y2;
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float y_2z = y * z2;
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float z_2z = z * z2;
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float w_2x = w * x2;
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float w_2y = w * y2;
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float w_2z = w * z2;
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matrix->right.x = 1.0f - (y_2y + z_2z);
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matrix->up.x = x_2y - w_2z;
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matrix->at.x = x_2z + w_2y;
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matrix->right.y = x_2y + w_2z;
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matrix->up.y = 1.0f - (x_2x + z_2z);
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matrix->at.y = y_2z - w_2x;
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matrix->right.z = x_2z - w_2y;
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matrix->up.z = y_2z + w_2x;
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matrix->at.z = 1.0f - (x_2x + y_2y);
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}
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STARTPATCHES
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InjectHook(0x4BA1C0, &CQuaternion::Slerp, PATCH_JUMP);
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InjectHook(0x4BA0D0, &CQuaternion::Get, PATCH_JUMP);
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ENDPATCHES
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