Cuptain/SegaRaycast
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Fixed some casting weirdness

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This commit is contained in:
Samuel Walker 2024-08-30 14:04:02 -06:00
parent 8574f9d0f0
commit 20e8375f18
1 changed files with 15 additions and 14 deletions
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29
src/main.c
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@ -28,7 +28,7 @@ void castRay(s16 angle){
fix16 dy = sinFix16(ind);
fix16 dx = cosFix16(ind);
fix16 tan = FIX16(1);
fix16 tan = FIX16(0);
if(dx != 0) tan = fix16Div(dy, dx);
fix16 aTan = FIX16(0);
if(tan != 0) aTan = fix16Div(FIX16(-1), tan);
@ -37,7 +37,7 @@ void castRay(s16 angle){
fix16 distH = FIX16(500);
fix16 hx = FIX16(l.pt1.x);
fix16 hy = FIX16(l.pt1.y);
if(angle == 0 || angle == 180){
if(dy == 0){
rx = FIX16(l.pt1.x);
ry = FIX16(l.pt1.y);
dof = 8;
@ -58,7 +58,11 @@ void castRay(s16 angle){
while(dof<8){
mx = fix16ToInt(rx) / 10;
my = fix16ToInt(ry) / 10;
if(mx >=0 && my >= 0 && mx < 10 && my < 10 && map[my][mx] == 1){
if(rx < 0 || ry < 0){
dof = 8;
continue;
}
if(mx < 10 && my < 10 && map[my][mx] == 1){
dof = 8;
hx = rx;
hy = ry;
@ -87,9 +91,11 @@ void castRay(s16 angle){
xo = FIX16(10);
yo = fix16Mul(0-xo,nTan);
}
if(angle == 90 || angle == 270){
if(dx == 0){
rx = FIX16(l.pt1.x);
ry = FIX16(l.pt1.y);
xo = FIX16(0);
yo = FIX16(0);
dof = 8;
}
while(dof<8){
@ -113,12 +119,6 @@ void castRay(s16 angle){
l.pt2.x = fix16ToInt(hx);
l.pt2.y = fix16ToInt(hy);
}
char* str[5];
sprintf(str, "%d", distV);
BMP_drawText(str, 20, 0);
char* str2[5];
sprintf(str2, "%d", distH);
BMP_drawText(str2, 20, 1);
}
void mapscan(){
@ -147,10 +147,11 @@ void render(){
//Draw the line defined above (in the background, hidden)
mapscan();
if(angle > 360) angle = 0;
if(angle < 0) angle = 359;
if(angle >= 360) angle = angle - 360;
if(angle < 0) angle = 360 + angle;
castRay(angle);
BMP_drawLine(&l);
BMP_showFPS(0);
//Flip the data to the screen - i.e. actually draw the complete image on screen
BMP_flip(1);
@ -172,11 +173,11 @@ void update(){
u16 joy = JOY_readJoypad(JOY_1);
if(joy & BUTTON_LEFT) {
//l.pt1.x -= SPEED;
angle--;
angle -= 1;
}
if(joy & BUTTON_RIGHT) {
//l.pt1.x += SPEED;
angle++;
angle += 1;
}
if(joy & BUTTON_UP) {
l.pt1.y -= SPEED;