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#include "../copyright"
#include <math.h>
#include <stdlib.h>
#include "c4.h"
#include "memmap.h"
int16_t C4WFXVal;
int16_t C4WFYVal;
int16_t C4WFZVal;
int16_t C4WFX2Val;
int16_t C4WFY2Val;
int16_t C4WFDist;
int16_t C4WFScale;
static double tanval;
static double c4x, c4y, c4z;
static double c4x2, c4y2, c4z2;
void C4TransfWireFrame()
{
c4x = (double) C4WFXVal;
c4y = (double) C4WFYVal;
c4z = (double) C4WFZVal - 0x95;
// Rotate X
tanval = -(double) C4WFX2Val * 3.14159265 * 2 / 128;
c4y2 = c4y * cos(tanval) - c4z * sin(tanval);
c4z2 = c4y * sin(tanval) + c4z * cos(tanval);
// Rotate Y
tanval = -(double)C4WFY2Val * 3.14159265 * 2 / 128;
c4x2 = c4x * cos(tanval) + c4z2 * sin(tanval);
c4z = c4x * - sin(tanval) + c4z2 * cos(tanval);
// Rotate Z
tanval = -(double) C4WFDist * 3.14159265 * 2 / 128;
c4x = c4x2 * cos(tanval) - c4y2 * sin(tanval);
c4y = c4x2 * sin(tanval) + c4y2 * cos(tanval);
// Scale
C4WFXVal = (int16_t)(c4x * (double)C4WFScale / (0x90 * (c4z + 0x95)) * 0x95);
C4WFYVal = (int16_t)(c4y * (double)C4WFScale / (0x90 * (c4z + 0x95)) * 0x95);
}
void C4TransfWireFrame2()
{
c4x = (double)C4WFXVal;
c4y = (double)C4WFYVal;
c4z = (double)C4WFZVal;
// Rotate X
tanval = -(double) C4WFX2Val * 3.14159265 * 2 / 128;
c4y2 = c4y * cos(tanval) - c4z * sin(tanval);
c4z2 = c4y * sin(tanval) + c4z * cos(tanval);
// Rotate Y
tanval = -(double) C4WFY2Val * 3.14159265 * 2 / 128;
c4x2 = c4x * cos(tanval) + c4z2 * sin(tanval);
c4z = c4x * -sin(tanval) + c4z2 * cos(tanval);
// Rotate Z
tanval = -(double)C4WFDist * 3.14159265 * 2 / 128;
c4x = c4x2 * cos(tanval) - c4y2 * sin(tanval);
c4y = c4x2 * sin(tanval) + c4y2 * cos(tanval);
// Scale
C4WFXVal = (int16_t)(c4x * (double)C4WFScale / 0x100);
C4WFYVal = (int16_t)(c4y * (double)C4WFScale / 0x100);
}
void C4CalcWireFrame()
{
C4WFXVal = C4WFX2Val - C4WFXVal;
C4WFYVal = C4WFY2Val - C4WFYVal;
if (abs(C4WFXVal) > abs(C4WFYVal))
{
C4WFDist = abs(C4WFXVal) + 1;
C4WFYVal = (int16_t)(256 * (double) C4WFYVal / abs(C4WFXVal));
if (C4WFXVal < 0)
C4WFXVal = -256;
else
C4WFXVal = 256;
}
else
{
if (C4WFYVal != 0)
{
C4WFDist = abs(C4WFYVal) + 1;
C4WFXVal = (int16_t)(256 * (double)C4WFXVal / abs(C4WFYVal));
if (C4WFYVal < 0)
C4WFYVal = -256;
else
C4WFYVal = 256;
}
else
C4WFDist = 0;
}
}
int16_t C41FXVal;
int16_t C41FYVal;
int16_t C41FAngleRes;
int16_t C41FDist;
int16_t C41FDistVal;
void C4Op1F()
{
if (C41FXVal == 0)
{
if (C41FYVal > 0)
C41FAngleRes = 0x80;
else
C41FAngleRes = 0x180;
}
else
{
tanval = (double) C41FYVal / C41FXVal;
C41FAngleRes = (int16_t)(atan(tanval) / (3.141592675 * 2) * 512);
if (C41FXVal < 0)
C41FAngleRes += 0x100;
C41FAngleRes &= 0x1FF;
}
}
void C4Op15()
{
tanval = sqrt((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal);
C41FDist = (int16_t) tanval;
}
void C4Op0D()
{
tanval = sqrt((double) C41FYVal * C41FYVal + (double) C41FXVal * C41FXVal);
tanval = C41FDistVal / tanval;
C41FYVal = (int16_t)(C41FYVal * tanval * 0.99);
C41FXVal = (int16_t)(C41FXVal * tanval * 0.98);
}
#ifdef ZSNES_C4
void C4LoaDMem(char* C4RAM)
{
memmove(C4RAM + (READ_WORD(C4RAM + 0x1f45) & 0x1fff),
S9xGetMemPointer(READ_3WORD(C4RAM + 0x1f40)),
READ_WORD(C4RAM + 0x1f43));
}
#endif
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