work

1 files changed, 155 insertions, 0 deletions

diff --git a/bullets.c b/bullets.c
new file mode 100644
index 0000000..0b35e12
--- /dev/null
+++ b/bullets.c
@@ -0,0 +1,155 @@
+#include "include/bullets.h"
+
+void shoot(platform_window* window) {
+	map_info info = get_map_info(window);
+	float bullet_range = 100.0f;
+
+	float hh = get_height_of_tile_under_coords(window, playerx, playery);
+
+	float dirx = (_global_mouse.x - (window->width/2));
+	float diry = (_global_mouse.y - (window->height/2));
+	double length = sqrt(dirx * dirx + diry * diry);
+	dirx /= length;
+	diry /= length;
+
+	float bulletx = playerx + (get_player_size_in_tile()/2);
+	float bullety = playery + (get_player_size_in_tile()/2);
+	float bullet_end_point_x = bulletx+dirx*bullet_range;
+	float bullet_end_point_y = bullety+diry*bullet_range;
+
+	for (int i = 0; i < max_bullets; i++) {
+		bullet b = bullets[i];
+		if (b.active) continue;
+
+		bullets[i] = (bullet){true, bulletx, bullety, hh + 0.5, bullet_end_point_x, bullet_end_point_y};
+		break;
+	}
+}
+
+bool check_if_bullet_collided_with_section(bullet* b, float* dist_of_closest_intersect, vec2f bstart, vec2f bend, vec2f l1, vec2f l2) {
+	if (lines_intersect(bstart, bend, l1, l2)) {
+		vec2f intersect_point = get_intersection_point(bstart, bend, l1, l2);
+
+		float dirx = (bstart.x - intersect_point.x);
+		float diry = (bstart.y - intersect_point.y);
+		double length_of_shot = sqrt(dirx * dirx + diry * diry);
+
+		if (length_of_shot > *dist_of_closest_intersect) {
+			return false;
+		}
+		*dist_of_closest_intersect = length_of_shot;
+		
+		b->endy = intersect_point.y;
+		b->endx = intersect_point.x;
+		return true;
+	}
+	return false;
+}
+
+bool check_if_bullet_collided_with_object(bullet* b, platform_window* window) {
+	map_info info = get_map_info(window);
+	float size = get_bullet_size_in_tile(window);
+	
+	vec2f bstart = (vec2f){b->position.x, b->position.y};
+	vec2f bend = (vec2f){b->endx, b->endy};
+
+	bool result = false;
+	float dist_of_closest_intersect = __FLT_MAX__;
+
+	for (int i = 0; i < max_objects; i++) {
+		object o = objects[i];
+		if (!o.active) continue;
+		if (b->position.z <= o.h + o.size.z && b->position.z >= o.h) {
+			box obj_box = get_box_of_square(window, (vec3f){o.position.x, o.position.y, o.h}, o.size);
+			if (check_if_bullet_collided_with_section(b, &dist_of_closest_intersect, bstart, bend, obj_box.bl_b, obj_box.br_b)) {
+				result = true;
+			}
+			if (check_if_bullet_collided_with_section(b, &dist_of_closest_intersect, bstart, bend, obj_box.tl_b, obj_box.tr_b)) {
+				result = true;
+			}
+			if (check_if_bullet_collided_with_section(b, &dist_of_closest_intersect, bstart, bend, obj_box.tl_b, obj_box.bl_b)) {
+				result = true;
+			}
+			if (check_if_bullet_collided_with_section(b, &dist_of_closest_intersect, bstart, bend, obj_box.tr_b, obj_box.br_b)) {
+				result = true;
+			}
+		}
+	}
+
+	return result;
+}
+
+bool check_if_bullet_collided_with_zombie(bullet b, platform_window* window, bool kill_if_collided) {
+	map_info info = get_map_info(window);
+	float size = get_bullet_size_in_tile(window);
+
+	for (int i = 0; i < max_zombies; i++) {
+		zombie o = zombies[i];
+		if (!o.alive) continue;
+
+		vec2f bstart = (vec2f){b.position.x, b.position.y};
+		vec2f bend = (vec2f){b.endx, b.endy};
+
+		if (b.position.z <= o.position.z + o.size.z && b.position.z >= o.position.z) {
+			if (lines_intersect(bstart, bend, (vec2f){o.position.x, o.position.y+o.size.y}, (vec2f){o.position.x+o.size.x, o.position.y+o.size.y}) || // bottom
+				lines_intersect(bstart, bend, (vec2f){o.position.x, o.position.y}, (vec2f){o.position.x+o.size.x, o.position.y}) || // top
+				lines_intersect(bstart, bend, (vec2f){o.position.x, o.position.y}, (vec2f){o.position.x, o.position.y+o.size.y}) || // left
+				lines_intersect(bstart, bend, (vec2f){o.position.x+o.size.x, o.position.y}, (vec2f){o.position.x+o.size.x, o.position.y+o.size.y})) // right
+			{
+				if (kill_if_collided) {
+					zombies[i].alive = false;
+				}
+				return true;
+			}		
+		}
+	}
+
+	return false;
+}
+
+void draw_bullets(platform_window* window) {
+	float size = get_bullet_size(window);
+	map_info info = get_map_info(window);
+
+	for (int i = 0; i < max_bullets; i++) {
+		bullet b = bullets[i];
+		if (!b.active) continue;
+
+		/*
+		if (is_in_bounds(window, b.position.x, b.position.y)) {
+			tile t = get_tile_under_coords(window, b.position.x, b.position.y);
+
+			float h = get_height_of_tile_under_coords(window, bullets[i].position.x, bullets[i].position.y);
+			if (h >= b.position.z) {
+				bullets[i].active = false; // hit the ground.
+			}
+		}
+		else {
+			bullets[i].active = false;
+		}*/
+
+		if (check_if_bullet_collided_with_object(&b, window)) {
+			bullets[i].endy = b.endy;
+			bullets[i].endx = b.endx;
+		}
+		
+		if (check_if_bullet_collided_with_zombie(b, window, true)) {
+			bullets[i].active = false;
+		}
+
+		bullets[i].alive_time += update_delta;
+		if (bullets[i].alive_time > 0.03f) bullets[i].active = false;
+
+		if (!b.active) continue;
+
+		BULLET_RENDER_DEPTH(b.position.z);
+
+		float bullet_render_x = b.position.x*info.tile_width + (b.position.y*info.px_incline);
+		float bullet_render_y = b.position.y*info.tile_height - (b.position.z*info.px_raised_per_h);
+
+		float bullet_render_x_end = b.endx*info.tile_width + (b.endy*info.px_incline);
+		float bullet_render_y_end = b.endy*info.tile_height - (b.position.z*info.px_raised_per_h);
+
+		renderer->render_line(bullet_render_x, bullet_render_y, bullet_render_x_end, bullet_render_y_end, 2, rgb(0,255,100));
+	}
+}
\ No newline at end of file