65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
#include "camera.h"
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#include "game.h"
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#include "display.h"
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void camera_init(void)
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{
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game.camera.view_rect = (rect_t) {
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.x = 0,
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.y = 0,
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.w = DISPLAY_WIDTH / 2,
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.h = DISPLAY_HEIGHT / 2
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};
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game.camera.tracking_pos = NULL;
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game.camera.tracking_center_offset = (vector2d_t) {
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.x = 0,
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.y = 0
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};
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}
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void camera_update(void)
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{
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if(game.camera.tracking_pos)
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{
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game.camera.view_rect.x = (int)game.camera.tracking_pos->x + game.camera.tracking_center_offset.x - game.camera.view_rect.w / 2;
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game.camera.view_rect.y = (int)game.camera.tracking_pos->y + game.camera.tracking_center_offset.y - game.camera.view_rect.h / 2;
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}
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if(game.map)
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{
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if(game.camera.view_rect.w > game.map->width * TILE_SIZE)
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{
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game.camera.view_rect.x = (game.map->width * TILE_SIZE - game.camera.view_rect.w) / 2;
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}
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else
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{
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if(game.camera.view_rect.x < 0)
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{
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game.camera.view_rect.x = 0;
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}
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else if(game.camera.view_rect.x + game.camera.view_rect.w > game.map->width * TILE_SIZE)
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{
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game.camera.view_rect.x = game.map->width * TILE_SIZE - game.camera.view_rect.w;
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}
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}
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if(game.camera.view_rect.h > game.map->height * TILE_SIZE)
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{
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game.camera.view_rect.y = (game.map->height * TILE_SIZE - game.camera.view_rect.h) / 2;
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}
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else
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{
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if(game.camera.view_rect.y < 0)
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{
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game.camera.view_rect.y = 0;
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}
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else if(game.camera.view_rect.y + game.camera.view_rect.h > game.map->height * TILE_SIZE)
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{
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game.camera.view_rect.y = game.map->height * TILE_SIZE - game.camera.view_rect.h;
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}
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}
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}
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}
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