Cuptain/SegaRaycast
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fixing raycasting

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This commit is contained in:
Samuel Walker 2024-08-30 09:09:31 -06:00
parent 45dbc32a56
commit d09db0dcb2
1 changed files with 28 additions and 9 deletions
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37
src/main.c
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@ -3,6 +3,7 @@
#define SPEED 2 #define SPEED 2
Line l; Line l;
s16 angle = 0;
const u8 map[10][10] = {{1,1,1,1,1,1,1,1,1,1}, const u8 map[10][10] = {{1,1,1,1,1,1,1,1,1,1},
{1,0,0,0,0,0,0,0,0,1}, {1,0,0,0,0,0,0,0,0,1},
@ -17,16 +18,34 @@ const u8 map[10][10] = {{1,1,1,1,1,1,1,1,1,1},
void castRay(s16 angle){ void castRay(s16 angle){
u8 r,mx,my,mp,dof; u8 r,mx,my,mp,dof;
float rx,ry,ra,xo,yo; fix16 rx,ry,ra,xo,yo;
s16 ind = (int)((float)angle/360.0f*1024.0f); s16 ind = (int)((float)angle/360.0f*1024.0f);
fix16 dx = sinFix16(ind); fix16 dy = sinFix16(ind);
fix16 dy = cosFix16(ind); fix16 dx = cosFix16(ind);
fix16 tan = fix16Div(dy, dx); fix16 tan = fix16Div(dy, dx);
fix16 aTan = fix16Div(-1, tan); fix16 aTan = fix16Div(FIX16(-1), tan);
s16 tanInt = fix16ToInt(fix16Mul(dx, 100)); s16 tanInt = fix16ToInt(fix16Mul(aTan, FIX16(100)));
char str[10]; dof = 0;
sprintf(str, "%d", 10); if(angle > 180) {
BMP_drawText(str, 20, 0); ry = FIX16(l.pt1.y / 10);
rx = fix16Add(fix16Mul(fix16Sub(FIX16(l.pt1.y), ry),aTan),FIX16(l.pt1.x));
yo = FIX16(-10);
xo = fix16Mul(fix16Neg(yo),aTan);
}
if(angle < 180) {
ry = FIX16((l.pt1.y / 10)+10);
rx = fix16Add(fix16Mul(fix16Sub(FIX16(l.pt1.y), ry),aTan),FIX16(l.pt1.x));
yo = FIX16(10);
xo = fix16Mul(fix16Neg(yo),aTan);
}
if(angle == 0 || angle == 180){
rx = FIX16(l.pt1.x);
ry = FIX16(l.pt1.y);
dof = 8;
}
while(dof<8){
}
} }
void mapscan(){ void mapscan(){
@ -56,7 +75,7 @@ void render(){
BMP_drawLine(&l); BMP_drawLine(&l);
mapscan(); mapscan();
castRay(10); castRay(286);
//Flip the data to the screen - i.e. actually draw the complete image on screen //Flip the data to the screen - i.e. actually draw the complete image on screen
BMP_flip(1); BMP_flip(1);