Funkin/source/shaderslmfao/ColorSwap.hx

package shaderslmfao;

import flixel.system.FlxAssets.FlxShader;
import flixel.util.FlxColor;

class ColorSwap
{
	public var shader(default, null):ColorSwapShader;
	public var colorToReplace(default, set):FlxColor;
	public var newColor(default, set):FlxColor;
	public var daTime(default, set):Float;
	public var hueShit:Float = 0;

	public function new():Void
	{
		shader = new ColorSwapShader();
		shader.uTime.value = [0];
		shader.money.value = [0];
	}

	public function update(elapsed:Float):Void
	{
		shader.uTime.value[0] += elapsed;
		hueShit += elapsed;
		// trace(shader.money.value[0]);
	}

	function set_colorToReplace(color:FlxColor):FlxColor
	{
		colorToReplace = color;

		return color;
	}

	function set_daTime(daTime:Float):Float
	{
		return daTime;
	}

	function set_newColor(color:FlxColor):FlxColor
	{
		newColor = color;

		return color;
	}
}

class ColorSwapShader extends FlxShader
{
	@:glFragmentSource('
        #pragma header

        uniform float uTime;
        uniform float money;

        vec3 normalizeColor(vec3 color)
        {
            return vec3(
                color[0] / 255.0,
                color[1] / 255.0,
                color[2] / 255.0
            );
        }

        vec3 rgb2hsv(vec3 c)
        {
            vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
            vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
            vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));

            float d = q.x - min(q.w, q.y);
            float e = 1.0e-10;
            return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
        }

        vec3 hsv2rgb(vec3 c)
        {
            vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
            vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
            return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
        }

        void main()
        {
            vec4 color = flixel_texture2D(bitmap, openfl_TextureCoordv);

            vec4 swagColor = vec4(rgb2hsv(vec3(color[0], color[1], color[2])), color[3]);
            
            // [0] is the hue???
            swagColor[0] += uTime;
            // swagColor[1] += uTime;

            // money += swagColor[0];

            color = vec4(hsv2rgb(vec3(swagColor[0], swagColor[1], swagColor[2])), swagColor[3]);

            gl_FragColor = color;
        }

    ')
	public function new()
	{
		super();
	}
}