OutRun/src/src/segment.cc

#include "../include/segment.h"
#include "../parameters.h"

Segment::Segment()
{
    //ctor
}


Segment::Segment( uint16_t n_seg )
{
    wX = 0;
    wY = 0;
    wZ = (double) (n_seg * SEGMENT_LENGTH);
    Curve = 0;
    Slope = 0;
}


Segment::Segment( int16_t x, int16_t y, double z, int8_t c, int8_t s )
{
    wX = x;
    wY = y;
    wZ = z;
    Curve = c;
    Slope = s;
    LDeco = -1;
    RDeco = -1;
}


Segment::Segment( int16_t x, int16_t y, double z, int8_t c, int8_t s, int8_t left, int8_t right )
{
    wX = x;
    wY = y;
    wZ = z;
    Curve = c;
    Slope = s;
    LDeco = left;
    RDeco = right;
}


Segment::~Segment()
{
    //dtor
}


void Segment::Project3DFP( camera* c )
{
    fixed_t DX = (fix(wX) - c->cX);
    fixed_t DY = (fix(wY) - c->cY);

    fixed_t divDZ = fdiv( fix(1), (fixdouble(wZ) - c->cZ));
    fixed_t RW = fix(ROAD_WIDTH);

    fixed_t divAR = fdiv(fix(1), fixdouble(ASPECT_RATIO));

    fixed_t Scale = fmul(fixdouble(DISTANCE_SCREEN), divDZ);

    fixed_t tempx = fmul(fmul(DX,Scale), divAR);
    fixed_t tempy = fmul(DY, Scale);
    fixed_t tempw = fmul(fmul(RW,Scale), divAR);

    fixed_t sX=fmul(fix(SCREEN_CX), (fix(1)+tempx));
    fixed_t sY=fmul(fix(SCREEN_CY), (fix(1)-tempy));
    fixed_t sW=fmul(fix(SCREEN_CX), tempw);

    X=fround(sX);
    Y=fround(sY);
    W=fround(sW);
}