92 lines
3.2 KiB
C
92 lines
3.2 KiB
C
/* ************************************************************************** */
|
|
/* */
|
|
/* :::::::: */
|
|
/* draw.c :+: :+: */
|
|
/* +:+ */
|
|
/* By: houtworm <codam@houtworm.net> +#+ */
|
|
/* +#+ */
|
|
/* Created: 2023/10/26 16:54:20 by houtworm #+# #+# */
|
|
/* Updated: 2023/11/05 11:04:09 by houtworm ######## odam.nl */
|
|
/* */
|
|
/* ************************************************************************** */
|
|
|
|
#include "../../cub3d.h"
|
|
|
|
void ft_drawspriteline(t_varlist *vl, t_draw *draw, int y, int x)
|
|
{
|
|
int d;
|
|
uint8_t *texel;
|
|
uint32_t color;
|
|
|
|
d = (y - draw->vmovescreen) * 256 - vl->h * 128 + draw->spriteheight * 128;
|
|
draw->texy = (d * 64) / draw->spriteheight / 256;
|
|
if (draw->texy < 0)
|
|
draw->texy = 0;
|
|
if (draw->texy > 64)
|
|
draw->texy = 64;
|
|
if (draw->texx < 0)
|
|
draw->texx = 0;
|
|
if (draw->texx > 64)
|
|
draw->texx = 64;
|
|
texel = &vl->temptext->pixels[(vl->temptext->width * draw->texy + draw->texx) * 4];
|
|
color = texel[0] << 24 | texel[1] << 16 | texel[2] << 8 | texel[3];
|
|
if (color != 0x980088FF)
|
|
mlx_put_pixel(vl->img, x, y, color);
|
|
}
|
|
|
|
void ft_drawsprite(t_varlist *vl, t_draw *draw, int x)
|
|
{
|
|
int y;
|
|
|
|
while (x < draw->drawendx)
|
|
{
|
|
draw->texx = (int)(256 * (x - (-draw->spritewidth / 2 + draw->spritescreen)) * 64 / draw->spritewidth) / 256;
|
|
if (draw->transformy > 0 && x > 0 && x < vl->w && draw->transformy < vl->distance[x] + 0.7)
|
|
{
|
|
y = draw->drawstarty;
|
|
while (y < draw->drawendy)
|
|
{
|
|
ft_drawspriteline(vl, draw, y, x);
|
|
y++;
|
|
}
|
|
}
|
|
x++;
|
|
}
|
|
}
|
|
|
|
t_draw *ft_initdrawsprite(t_varlist *vl, int i)
|
|
{
|
|
double spritex;
|
|
double spritey;
|
|
double invdet;
|
|
t_draw *draw;
|
|
|
|
draw = ft_calloc(12, 8);
|
|
spritex = vl->sprite[i].x - vl->posx;
|
|
spritey = vl->sprite[i].y - vl->posy;
|
|
invdet = 1.0 / (vl->planex * vl->diry - vl->dirx * vl->planey);
|
|
draw->transformx = invdet * (vl->diry * spritex - vl->dirx * spritey);
|
|
draw->transformy = invdet * (-vl->planey * spritex + vl->planex * spritey);
|
|
draw->spritescreen = (vl->w / 2) * (1 + draw->transformx / draw->transformy);
|
|
draw->vmovescreen = vl->vaim + vl->jump / draw->transformy;
|
|
draw->spriteheight = fabs((vl->h / draw->transformy));
|
|
return (draw);
|
|
}
|
|
|
|
void ft_getdrawstartend(t_varlist *vl, t_draw *draw)
|
|
{
|
|
draw->drawstarty = -draw->spriteheight / 2 + vl->h / 2 + draw->vmovescreen;
|
|
if (draw->drawstarty < 0)
|
|
draw->drawstarty = 0;
|
|
draw->drawendy = draw->spriteheight / 2 + vl->h / 2 + draw->vmovescreen;
|
|
if (draw->drawendy >= vl->h)
|
|
draw->drawendy = vl->h - 1;
|
|
draw->spritewidth = abs((int)(vl->h / draw->transformy));
|
|
draw->drawstartx = -draw->spritewidth / 2 + draw->spritescreen;
|
|
if (draw->drawstartx < 0)
|
|
draw->drawstartx = 0;
|
|
draw->drawendx = draw->spritewidth / 2 + draw->spritescreen;
|
|
if (draw->drawendx >= vl->w)
|
|
draw->drawendx = vl->w - 1;
|
|
}
|