1 files changed, 150 insertions, 0 deletions
diff --git a/game-state.c b/game-state.c
new file mode 100644
index 0000000..420c6d9
--- /dev/null
+++ b/game-state.c
@@ -0,0 +1,150 @@
+#include "game-state.h"
+#include <stdlib.h>
+
+/* const int ENEMY_COUNT_MAX = 1000; */
+/* const int TOWER_COUNT_MAX = 5; */
+const enemy_spawner_t DEFAULT_ENEMY_SPAWNER = {
+    .border = { .x = 0, .y = 0, .width = WINDOW_WIDTH, .height = WINDOW_HEIGHT },
+    .cooldown = 100.0f,
+    .cooldown_max = 100.0f
+};
+
+float mouse_x(gs_t *gs){
+    Camera2D *cam = &gs->player.camera;
+    return cam->target.x + GetMouseX() - cam->offset.x;
+}
+
+float mouse_y(gs_t *gs){
+    Camera2D *cam = &gs->player.camera;
+    return cam->target.y + GetMouseY() - cam->offset.y;
+}
+
+void add_tower(gs_t *gs, tower_t tower){
+    if (gs->tower_count == TOWER_COUNT_MAX){
+        return;
+    }
+    gs->towers[gs->tower_count++] = tower;
+}
+
+void add_enemy(gs_t *gs, enemy_t enemy){
+    if (gs->enemy_count == ENEMY_COUNT_MAX){
+        return;
+    }
+    gs->enemies[gs->enemy_count++] = enemy;
+}
+
+void add_beam(gs_t *gs, tower_beam_t beam){
+    if (gs->beam_count == MAX_BEAM_COUNT){
+        return;
+    }
+    gs->beams[gs->beam_count++] = beam;
+}
+
+void kill_enemy(gs_t *gs, int index){
+    /* enemy_t temp = gs->enemies[index]; */
+    gs->enemies[index].active = 0;
+    gs->enemies[index] = gs->enemies[gs->enemy_count - 1];
+    /* gs->enemies[gs->enemy_count] = temp; */
+    gs->enemy_count--;
+    /* printf("enemy <%d> killed\n", index); */
+}
+
+void update_game(gs_t *gs, float dt){
+    update_player(&gs->player, dt);
+    for (int i = 0; i < gs->enemy_count; i++){
+        update_enemy(gs->enemies + i, gs->player.position, dt);
+    }
+    for (int i = 0; i < gs->tower_count; i++){
+        update_tower(&gs->towers[i], dt);
+    }
+    for (int i = 0; i < gs->tower_count; i++){
+        tower_t *tow = &gs->towers[i];
+        if (tow->cooldown <= 0){
+            for (int j = 0; j < gs->enemy_count; j++){
+                enemy_t *e = &gs->enemies[j];
+                if /* (distance(gs->towers[i].center, gs->enemies[j].center) */
+                   /*  < gs->towers[i].range) */
+                    (e->active && CheckCollisionCircleRec(tow->center, tow->range, e->hitbox)){
+                    add_beam(gs, make_beam(tow->position,
+                                           /* gs->enemies[j].center */
+                                           e->position, 0.1));
+                    e->health -= tow->damage;
+                    tow->cooldown = tow->cooldown_max;
+                    PlaySound(BEAM_SOUND);
+                    if (e->health <= 0){
+                        kill_enemy(gs, j);
+                    }
+                    break;
+                }
+            }
+        }
+    }
+    for (int i = 0; i < gs->enemy_count; i++){
+        if (CheckCollisionRecs(gs->enemies[i].hitbox, gs->player.hitbox)){
+            int remaining = take_damage(&gs->player, 1);
+            if (remaining == 0){
+                Camera2D camera = gs->player.camera;
+                gs->player = make_player(&textures[T_PLAYER]);
+                gs->player.camera.zoom = camera.zoom;
+            }
+            /* printf("collision\n"); */
+        }
+    }
+    for (int i = 0; i < gs->beam_count; i++){
+        gs->beams[i].live_time -= dt;
+        if (gs->beams[i].live_time <= 0){
+            gs->beams[i] = gs->beams[gs->beam_count];
+            gs->beam_count--;
+        }
+    }
+
+    if (can_spawn(&gs->spawner) && gs->enemy_count < ENEMY_COUNT_MAX){
+        add_enemy(gs, spawn_enemy(&gs->spawner));
+    }
+    update_spawner(&gs->spawner, dt);
+
+    if (IsKeyPressed(KEY_T)){
+        add_tower(gs, make_tower(1, 100, mouse_x(gs), mouse_y(gs), 20, 30, &textures[T_TOWER]));
+    }
+    if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
+        paint_tile(gs);
+    }
+}
+
+void draw_game(gs_t *gs){
+    draw_player(&gs->player);
+    for (int i = 0; i < gs->tower_count; i++){
+        draw_tower(gs->towers + i);
+    }
+    for (int i = 0; i < gs->enemy_count; i++){
+        draw_enemy(gs->enemies + i);
+    }
+    for (int i = 0; i < gs->beam_count; i++){
+        DrawLineV(gs->beams[i].src, gs->beams[i].dest, MAGENTA);
+    }
+    /* if (IsKeyDown(KEY_E)){ */
+
+    /* } */
+    DrawCircle(mouse_x(gs), mouse_y(gs), 5, VIOLET);
+}
+
+void paint_tile(gs_t *gs){
+    float zoom = gs->player.camera.zoom;
+    float edge_len = 16 / zoom;
+    Camera2D *c = &gs->player.camera;
+    int edge = edge_len * c->zoom;
+    int x = mouse_x(gs) / edge;
+    int y = (WINDOW_HEIGHT - mouse_y(gs)) / edge;
+    /* int y = (GetMouseY() - gs.player.camera.target.y) / edge_len; */
+    printf("drawing tile(%d, %d) at %d %d\n", x, y, x * edge, y * edge);
+    if /* (x >= 0 && x < WINDOW_WIDTH && y >= 0 && y < WINDOW_HEIGHT) */
+        (1){
+        BeginTextureMode(gs->bg_tiles);
+        DrawTextureRec(gs->textures[T_DIRT], (Rectangle){ 0, 0, 16, 16 },
+                       (Vector2){x * edge /* / zoom */, y * edge /* / zoom */}
+                       /* (Vector2){0, edge_len * yy} */
+                       , WHITE);
+        EndTextureMode();
+        /* yy++; */
+    }
+}