src/ft_draw_sprite.c


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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_draw_sprite.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/24 20:22:45 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/24 20:22:47 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <libft.h>
#include <cub3d.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

void
	ft_draw_sprite(t_cub *cl, t_sprite *sprite)
{
	int32_t d;

  /* printf("start x : %d\nstart y : %d\nend x : %d\nend y : %d\n", sprite->drawstartx, sprite->drawstarty, sprite->drawendy, sprite->drawendy); */
	sprite->x = sprite->drawstartx;
	while (sprite->x < sprite->drawendx)
	{
		sprite->tex_x = (int32_t)((sprite->x - (-sprite->spritewidth / 2 +
		sprite->spritescreenx)) * cl->tlist[4].img_w / sprite->spritewidth);
		sprite->y = sprite->drawstarty;
		if (sprite->transformy > 0 && sprite->x >= 0 &&
		sprite->x < (int32_t)cl->wlist->x_size)
    while (sprite->y < sprite->drawendy)
    {
      d = sprite->y * 256 - cl->wlist->y_size * 128 +
      sprite->spriteheight * 128;
      sprite->tex_y = ((d * cl->tlist[4].img_h / 2) /
      sprite->spriteheight) / 128;
      if (cl->tlist[4].ptr[sprite->tex_x * 4 + 4 * cl->tlist[4].img_h * sprite->tex_y])
      {
        cl->img.ptr[sprite->x * 4 + (sprite->y *
        cl->img.sizeline)] =
        cl->tlist[4].ptr[sprite->tex_x * 4 + 4 * cl->tlist[4].img_h * sprite->tex_y];
        cl->img.ptr[sprite->x * 4 + (sprite->y *
        cl->img.sizeline) + 1] =
        cl->tlist[4].ptr[sprite->tex_x * 4 + 4 * cl->tlist[4].img_h * sprite->tex_y + 1];
        cl->img.ptr[sprite->x * 4 + (sprite->y *
        cl->img.sizeline) + 2] =
        cl->tlist[4].ptr[sprite->tex_x * 4 + 4 * cl->tlist[4].img_h * sprite->tex_y + 2];
      }
      sprite->y++;
    }
  sprite->x++;
  }
}