package main

import "core:fmt"
import "core:math"
import sdl "sdl3"

main :: proc() {
	fmt.println("Hello world")
	_ = sdl.Init(sdl.INIT_VIDEO)

	window: ^sdl.Window
	renderer: ^sdl.Renderer
	sdl.CreateWindowAndRenderer("SDL3 with Odin", 800, 600, {.RESIZABLE}, &window, &renderer)
	sdl.SetRenderVSync(renderer, 1)

	running := true
	for running {
		e: sdl.Event
		for sdl.PollEvent(&e) {
			#partial switch e.type {
			case .QUIT:
				running = false
			}
		}

		now := f64(sdl.GetTicks()) / 1000.0 /* convert from milliseconds to seconds. */
		/* choose the color for the frame we will draw. The sine wave trick makes it fade between colors smoothly. */
		red :=   f32(0.5 + 0.5 * math.sin(now))
		green := f32(0.5 + 0.5 * math.sin(now + math.PI * 2 / 3))
		blue :=  f32(0.5 + 0.5 * math.sin(now + math.PI * 4 / 3))
		sdl.SetRenderDrawColorFloat(
			renderer,
			red,
			green,
			blue,
			sdl.ALPHA_OPAQUE_FLOAT,
		) /* new color, full alpha. */

		// sdl.SetRenderDrawColor(renderer, 255, 0, 0, 255)

		sdl.RenderClear(renderer)
		sdl.RenderPresent(renderer)
	}
}