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narnaud 3 years ago
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1 changed files with 96 additions and 86 deletions
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  1. 182
      sources/render.c

182
sources/render.c
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@ -6,7 +6,7 @@
/* By: narnaud <narnaud@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/05/31 09:33:02 by narnaud #+# #+# */
/* Updated: 2022/06/07 09:22:47 by narnaud ### ########.fr */
/* Updated: 2022/06/07 11:46:39 by narnaud ### ########.fr */
/* */
/* ************************************************************************** */
@ -65,15 +65,101 @@ void render_minimap(t_env *env, t_vec size)
env->playerPos.x * dX - dX / 4, env->playerPos.y * dY - dY / 4,
dX / 2, dY / 2, 255}, 0);
}
void render_view(t_env* env)
void draw_vert(t_env *env, t_raycast *rc, int side, int x)
{
double camX;
int side;
t_raycast rc;
int x;
int startEnd[2];
int texHeight;
int texX;
int texY;
double step;
double texPos;
int lineHeight;
int mapVal;
lineHeight = (int)(WIN_Y_SZ / rc->sDist[side]);
if (lineHeight < 0)
lineHeight = 0;
startEnd[0] = -lineHeight / 2 + WIN_Y_SZ / 2;
if (startEnd[0] < 0)
startEnd[0] = 0;
startEnd[1] = lineHeight / 2 + WIN_Y_SZ / 2;
if(startEnd[1] >= WIN_Y_SZ)
startEnd[1] = WIN_Y_SZ - 1;
texHeight = env->tex[rc->tex].height;
draw_rectangle(env, (t_rectangle){x, 0, 1, startEnd[0], env->ceilColor}, 0);
//draw_rectangle(env, (t_rectangle){x, startEnd[0], 1, startEnd[1] - startEnd[0] - 1, color}, 0);
texX = (int)(rc->wallX * (double)env->tex[rc->tex].width);
if(!side && rc->vec.x > 0)
texX = env->tex[rc->tex].width - texX - 1;
if(side && rc->vec.y < 0)
texX = env->tex[rc->tex].width - texX - 1;
step = 1.0 * texHeight / lineHeight;
texPos = (startEnd[0] - WIN_Y_SZ / 2 + lineHeight / 2) * step;
while (startEnd[0] < startEnd[1])
{
texY = (int)texPos & (texHeight - 1);
texPos += step;
env->buffer[env->line_bytes * startEnd[0] + x] \
= env->tex[rc->tex].buffer[texHeight * texY + texX];
startEnd[0]++;
}
draw_rectangle(env, (t_rectangle){x, startEnd[1], 1, WIN_Y_SZ - startEnd[1], env->floorColor}, 0);
}
int to_draw(t_env *env, t_raycast *rc, int *side)
{
*side = 0;
if (rc->sDist[0] > rc->sDist[1])
(*side)++;
rc->cell[*side] += rc->step[*side];
if (env->map[rc->cell[1]][rc->cell[0]] > '0')
{
if (env->map[rc->cell[1]][rc->cell[0]] == '1')
rc->tex = 3 - *side * 2 - (rc->step[*side] + 1) / 2;
else if (env->map[rc->cell[1]][rc->cell[0]] == '2' && rc->tex != 4)
rc->tex = 4;
else
return (0);
if (!*side)
rc->wallX= env->playerPos.y + rc->sDist[*side] * rc->vec.y;
else
rc->wallX = env->playerPos.x + rc->sDist[*side] * rc->vec.x;
rc->wallX -= floor(rc->wallX);
if (rc->tex != 4 || 2 * rc->wallX - vec_len((t_vec_d){rc->cell[0] - env->playerPos.x, rc->cell[1] - env->playerPos.y}) < -2)
return (1);
}
else
rc->tex = 0;
return (0);
}
void init_vert_rc(t_env *env, t_raycast *rc)
{
if (rc->vec.x == 0)
rc->dDist[0] = 1e30;
else
rc->dDist[0] = fabs(1 / rc->vec.x);
if (rc->vec.y == 0)
rc->dDist[1] = 1e30;
else
rc->dDist[1] = fabs(1 / rc->vec.y);
rc->step = (int[2]){0, 0};
if (rc->vec.x < 0 && --rc->step[0])
rc->sDist[0] = (env->playerPos.x - rc->cell[0]) * rc->dDist[0];
else if (++rc->step[0])
rc->sDist[0] = (rc->cell[0] + 1.0 - env->playerPos.x) * rc->dDist[0];
if (rc->vec.y < 0 && --rc->step[1])
rc->sDist[1] = (env->playerPos.y - rc->cell[1]) * rc->dDist[1];
else if (++rc->step[1])
rc->sDist[1] = (rc->cell[1] + 1.0 - env->playerPos.y) * rc->dDist[1];
}
void render_view(t_env* env)
{
int side;
t_raycast rc;
int x;
double camX;
x = 0;
while (x < WIN_X_SZ)
@ -83,86 +169,10 @@ void render_view(t_env* env)
set_vec(&rc.vec, env->playerDir.x + env->camPlan.x * camX,
env->playerDir.y + env->camPlan.y * camX);
rc.cell = (int[2]){env->playerPos.x, env->playerPos.y};
if (rc.vec.x == 0)
rc.dDist[0] = 1e30;
else
rc.dDist[0] = fabs(1 / rc.vec.x);
if (rc.vec.y == 0)
rc.dDist[1] = 1e30;
else
rc.dDist[1] = fabs(1 / rc.vec.y);
rc.step = (int[2]){0, 0};
if (rc.vec.x < 0 && --rc.step[0])
rc.sDist[0] = (env->playerPos.x - rc.cell[0]) * rc.dDist[0];
else if (++rc.step[0])
rc.sDist[0] = (rc.cell[0] + 1.0 - env->playerPos.x) * rc.dDist[0];
if (rc.vec.y < 0 && --rc.step[1])
rc.sDist[1] = (env->playerPos.y - rc.cell[1]) * rc.dDist[1];
else if (++rc.step[1])
rc.sDist[1] = (rc.cell[1] + 1.0 - env->playerPos.y) * rc.dDist[1];
while (1)
{
side = 0;
if (rc.sDist[0] > rc.sDist[1])
side++;
rc.cell[side] += rc.step[side];
mapVal = env->map[rc.cell[1]][rc.cell[0]];
if (mapVal > '0')
{
if (mapVal == '2' && rc.tex != 4)
rc.tex = 4;
else if (mapVal == '1')
rc.tex = 3 - side * 2 - (rc.step[side] + 1) / 2;
else
{
rc.sDist[side] += rc.dDist[side];
continue ;
}
if (!side)
rc.wallX= env->playerPos.y + rc.sDist[side] * rc.vec.y;
else
rc.wallX = env->playerPos.x + rc.sDist[side] * rc.vec.x;
rc.wallX -= floor(rc.wallX);
if (rc.tex == 4 && 2 * rc.wallX - vec_len((t_vec_d){rc.cell[0] - env->playerPos.x, rc.cell[1] - env->playerPos.y}) > -2)
{
rc.sDist[side] += rc.dDist[side];
continue;
}
break ;
}
else
rc.tex = 0;
init_vert_rc(env, &rc);
while (!to_draw(env, &rc, &side))
rc.sDist[side] += rc.dDist[side];
}
lineHeight = (int)(WIN_Y_SZ / rc.sDist[side]);
if (lineHeight < 0)
lineHeight = 0;
startEnd[0] = -lineHeight / 2 + WIN_Y_SZ / 2;
if (startEnd[0] < 0)
startEnd[0] = 0;
startEnd[1] = lineHeight / 2 + WIN_Y_SZ / 2;
if(startEnd[1] >= WIN_Y_SZ)
startEnd[1] = WIN_Y_SZ - 1;
int texHeight = env->tex[rc.tex].height;
draw_rectangle(env, (t_rectangle){x, 0, 1, startEnd[0], env->ceilColor}, 0);
//draw_rectangle(env, (t_rectangle){x, startEnd[0], 1, startEnd[1] - startEnd[0] - 1, color}, 0);
int texX = (int)(rc.wallX * (double)env->tex[rc.tex].width);
if(!side && rc.vec.x > 0)
texX = env->tex[rc.tex].width - texX - 1;
if(side && rc.vec.y < 0)
texX = env->tex[rc.tex].width - texX - 1;
double step = 1.0 * texHeight / lineHeight;
double texPos = (startEnd[0] - WIN_Y_SZ / 2 + lineHeight / 2) * step;
for(int y = startEnd[0]; y<startEnd[1]; y++)
{
int texY = (int)texPos & (texHeight - 1);
texPos += step;
env->buffer[env->line_bytes * y + x] \
= env->tex[rc.tex].buffer[texHeight * texY + texX];
}
draw_rectangle(env, (t_rectangle){x, startEnd[1], 1, WIN_Y_SZ - startEnd[1], env->floorColor}, 0);
draw_vert(env, &rc, side, x);
x++;
}
}

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