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71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
#include "global.h"
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// The code in this file is very similar to a spline system used in Super Mario 64 for cutscene camera movement
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void func_800BB0A0(f32 u, Vec3f* pos, f32* roll, f32* viewAngle, f32* point0, f32* point1, f32* point2, f32* point3) {
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f32 coeff[4];
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u = CLAMP_MAX(u, 1.0f);
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coeff[0] = (1.0f - u) * (1.0f - u) * (1.0f - u) / 6.0f;
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coeff[1] = u * u * u / 2.0f - u * u + 2.0f / 3.0f;
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coeff[2] = -u * u * u / 2.0f + u * u / 2.0f + u / 2.0f + 1.0f / 6.0f;
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coeff[3] = u * u * u / 6.0f;
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pos->x = (coeff[0] * point0[0]) + (coeff[1] * point1[0]) + (coeff[2] * point2[0]) + (coeff[3] * point3[0]);
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pos->y = (coeff[0] * point0[1]) + (coeff[1] * point1[1]) + (coeff[2] * point2[1]) + (coeff[3] * point3[1]);
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pos->z = (coeff[0] * point0[2]) + (coeff[1] * point1[2]) + (coeff[2] * point2[2]) + (coeff[3] * point3[2]);
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*roll = (coeff[0] * point0[3]) + (coeff[1] * point1[3]) + (coeff[2] * point2[3]) + (coeff[3] * point3[3]);
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*viewAngle = (coeff[0] * point0[4]) + (coeff[1] * point1[4]) + (coeff[2] * point2[4]) + (coeff[3] * point3[4]);
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}
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s32 func_800BB2B4(Vec3f* pos, f32* roll, f32* fov, CutsceneCameraPoint* point, s16* keyFrame, f32* curFrame) {
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s32 ret = false;
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f32 pointData[4][5];
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s32 i;
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f32 progress = *curFrame;
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s32 key = *keyFrame;
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f32 speed1 = 0.0f;
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f32 speed2 = 0.0f;
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f32 advance;
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if (key < 0) {
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progress = 0.0f;
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}
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if ((point[key].continueFlag == -1) || (point[key + 1].continueFlag == -1) || (point[key + 2].continueFlag == -1)) {
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return true;
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}
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for (i = 0; i < 4; i++) {
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pointData[i][0] = point[key + i].pos.x;
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pointData[i][1] = point[key + i].pos.y;
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pointData[i][2] = point[key + i].pos.z;
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pointData[i][3] = point[key + i].cameraRoll;
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pointData[i][4] = point[key + i].viewAngle;
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}
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func_800BB0A0(progress, pos, roll, fov, pointData[0], pointData[1], pointData[2], pointData[3]);
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if (point[*keyFrame + 1].nextPointFrame != 0) {
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speed1 = 1.0f / point[*keyFrame + 1].nextPointFrame;
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}
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if (point[*keyFrame + 2].nextPointFrame != 0) {
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speed2 = 1.0f / point[*keyFrame + 2].nextPointFrame;
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}
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advance = (*curFrame * (speed2 - speed1)) + speed1;
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if (advance < 0.0f) {
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advance = 0;
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}
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*curFrame += advance;
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if (*curFrame >= 1) {
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if (point[++*keyFrame + 3].continueFlag == -1) {
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*keyFrame = 0;
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ret = true;
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}
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*curFrame -= 1;
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}
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return ret;
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}
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