package main

import "core:rexcode/isa/x86/tablegen/generated"
import rl "vendor:raylib"

Particle :: union {
	SpriteParticle,
	LineParticle,
}

SpriteParticle :: struct {
	pos:      rl.Vector2,
	texture:  rl.Texture2D,
	tint:     rl.Color,
	lifetime: f32,
}
LineParticle :: struct {
	pos1:     rl.Vector2,
	pos2:     rl.Vector2,
	tint:     rl.Color,
	lifetime: f32,
}

particles: [dynamic]Particle

spawn_particle :: proc(particle: Particle) {
	append(&particles, particle)
}

run_particle_system :: proc() {
	for &p, i in particles {
		draw_particle(&p, i)
	}
}

draw_particle :: proc(particle: ^Particle, index: int) {
	switch &p in particle {
	case SpriteParticle:
		draw_sprite_particle(&p, index)

	case LineParticle:
		draw_line_particle(&p, index)
	}
}

draw_sprite_particle :: proc(particle: ^SpriteParticle, index: int) {
	rl.DrawTexture(particle.texture, i32(particle.pos.x), i32(particle.pos.y), particle.tint)
	particle.lifetime -= rl.GetFrameTime()
	if particle.lifetime <= 0 {
		particles[index] = nil
	}
}

draw_line_particle :: proc(particle: ^LineParticle, index: int) {
	rl.DrawLineV(particle.pos1, particle.pos2, particle.tint)
	particle.lifetime -= rl.GetFrameTime()
	if particle.lifetime <= 0 {
		particles[index] = nil
	}
}