55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
#include <gint/display.h>
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#include "conf.h"
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#include "level.h"
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#include "camera.h"
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#include "tiles.h"
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#define VEC_PRECISE_HALF_DISP (Vec){DWIDTH * VEC_PRECISION / (2 * SCALE), DHEIGHT * VEC_PRECISION / (2 * SCALE)}
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void level_step(const Level *level) {
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}
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void level_draw(const Level *level, Camera *camera) {
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for (int i = 0; i < level->layers_count; ++i) {
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layer_draw(level, camera, i);
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}
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}
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void layer_draw(const Level *level, Camera *camera, uint layer_id) {
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/* Include tileset. */
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extern bopti_image_t img_tileset;
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const Tile *layer = level->layers[layer_id];
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#ifdef FX9860G
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const int color = C_LIGHT;
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#endif /* FX9860G */
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#ifdef FXCG50
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const int color = C_GREEN;
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#endif /* FXCG50 */
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Vec display_tl, display_br;
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vec_cpy(&display_tl, camera->pos);
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vec_cpy(&display_br, display_tl);
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vec_sub(&display_tl, VEC_PRECISE_HALF_DISP);
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vec_add(&display_br, VEC_PRECISE_HALF_DISP);
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vec_div(&display_tl, TILE_SIZE);
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vec_div(&display_br, TILE_SIZE);
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int start_x = (display_tl.x > 0) ? (display_tl.x) : (0);
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int start_y = (display_tl.y > 0) ? (display_tl.y) : (0);
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int end_x = (display_br.x < level->width) ? (display_br.x + 1) : (level->width);
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int end_y = (display_br.y < level->height) ? (display_br.y + 1) : (level->height);
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for (int y = start_y; y < end_y; ++y) {
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for (int x = start_x; x < end_x; ++x) {
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const Tile tile = layer[x + y * level->width];
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if (tile) {
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const Vec tl = {
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(x * TILE_SIZE / VEC_PRECISION - camera->offset.x) * SCALE,
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(y * TILE_SIZE / VEC_PRECISION - camera->offset.y) * SCALE };
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dsubimage(tl.x, tl.y, &img_tileset,
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tile % TILESET_WIDTH * TILE_PX_SIZE,
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tile / TILESET_WIDTH * TILE_PX_SIZE,
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TILE_PX_SIZE, TILE_PX_SIZE, 0);
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}
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}
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}
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}
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