124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* render_sprite.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: qmennen <qmennen@student.codam.nl> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/05/08 12:23:17 by qmennen #+# #+# */
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/* Updated: 2025/06/03 15:00:43 by qmennen ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "render.h"
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static void get_start_end(t_game *game,
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t_sprite *sprite, t_vec2_int *start, t_vec2_int *end)
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{
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double sprite_scale;
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sprite_scale = game->screen->height / sprite->dist
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/ sprite->texture->height;
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start->x = 0.5 * (game->screen->width * (1.0 + sprite->cam_frac)
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- sprite->texture->width / sprite->n_frames * sprite_scale);
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start->y = 0.5 * (game->screen->height
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- sprite->texture->height * sprite_scale);
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end->x = start->x;
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end->x += sprite->texture->width / sprite->n_frames * sprite_scale;
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end->y = start->y + sprite->texture->height * sprite_scale;
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}
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static int sprite_visible(t_game *game,
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t_sprite *sprite, t_render *render, int x)
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{
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return (!isnan(sprite->cam_frac)
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&& sprite->dist > MIN_SPRITE_DIST
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&& x > 0
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&& x < game->screen->width
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&& sprite->dist <= render[x].perp_dist);
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}
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static void draw_sprite_column(
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t_game *game, t_sprite *sprite, t_render *render,
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t_sprite_column column)
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{
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t_vec2_int tex;
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t_vec2 inv_range;
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int y;
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unsigned int color;
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int frame;
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frame = (game->elapsed_time * sprite->animation_speed);
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frame %= sprite->n_frames;
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inv_range.y = 1.0 / (column.end.y - column.start.y);
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inv_range.x = 1.0 / (column.end.x - column.start.x);
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sprite->alpha = calculate_alpha(column.start.x,
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column.start.y, sprite->dist);
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tex.x = column.x - column.start.x;
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tex.x *= sprite->texture->width / sprite->n_frames;
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tex.x *= inv_range.x;
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y = column.start.y;
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while (y < column.end.y)
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{
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tex.y = (y - column.start.y) * sprite->texture->height;
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tex.y *= inv_range.y;
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color = sample_texture_color(sprite, tex, frame);
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if (y > 0 && y < game->screen->height && (color & 0xFF) != 0)
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mlx_put_pixel(game->screen->img, column.x, y, color);
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y++;
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}
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}
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void handle_flash(t_sprite *sprite, t_game *game)
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{
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if (sprite->type == SPRITE_TYPE_ENEMY && game->screen->flash > 0
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&& sprite->dist < 2.0)
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sprite->type = SPRITE_TYPE_DISABLED;
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}
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void draw_sprite(t_game *game, t_sprite *sprite, t_render *render)
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{
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t_vec2_int start;
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t_vec2_int end;
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t_sprite_column column;
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int x;
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if (isnan(sprite->cam_frac) || sprite->dist <= MIN_SPRITE_DIST)
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return ;
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get_start_end(game, sprite, &start, &end);
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x = start.x;
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while (x < end.x)
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{
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if (sprite_visible(game, sprite, render, x))
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{
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handle_flash(sprite, game);
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column.start = start;
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column.end = end;
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column.x = x;
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draw_sprite_column(game, sprite, render, column);
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}
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x++;
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}
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}
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void render_sprites(t_render *render, t_game *game)
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{
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int i;
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calculate_sprite_dist(game);
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sort_sprites(game);
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i = 0;
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while (i < game->map->n_sprites)
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{
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if (game->map->sprites[i].type == SPRITE_TYPE_DISABLED
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|| game->map->sprites[i].type == SPRITE_TYPE_COLLECTED)
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{
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i++;
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continue ;
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}
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cam_fraction(game, &game->map->sprites[i]);
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draw_sprite(game, &game->map->sprites[i], render);
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i++;
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}
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}
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