mat_maker_gd/pattern_scratches.gd

tool
extends TextureRect

var image : Image
var tex : ImageTexture

export(Vector2) var bmin : Vector2 = Vector2(0.1, 0.1)
export(Vector2) var bmax : Vector2 = Vector2(1, 1)

export(bool) var refresh setget reff,reffg

func _ready():
	if !Engine.editor_hint:
		gen()


func gen() -> void:
	if !image:
		image = Image.new()
		image.create(300, 300, false, Image.FORMAT_RGBA8)
		
	if !tex:
		tex = ImageTexture.new()
		
#	var bmin : Vector2 = Vector2(0.1, 0.1)
#	var bmax : Vector2 = Vector2(1, 1)

	image.lock()
	
	var w : float = image.get_width()
	var h : float = image.get_width()
	
	var pseed : float = randf() + randi()
	
	for x in range(image.get_width()):
		for y in range(image.get_height()):
			var v : Vector2 = Vector2(x / w, y / h)

#			var f : float = pattern(v, 4, 4, CombinerType.MULTIPLY, CombinerAxisType.SINE, CombinerAxisType.SINE)

			var col : Color = scratchescol(v)

			image.set_pixel(x, y, col)

			
	image.unlock()
	
	tex.create_from_image(image)
	texture = tex

var seed_o74963 = 31821;
var p_o74963_length = 0.250000000;
var p_o74963_width = 0.400000000;
var p_o74963_layers = 5.000000000;
var p_o74963_waviness = 0.510000000;
var p_o74963_angle = -1.000000000;
var p_o74963_randomness = 0.440000000;

func scratchescol(uv : Vector2) -> Color:
	var f : float =  scratches(((uv)), int(p_o74963_layers), Vector2(p_o74963_length, p_o74963_width), p_o74963_waviness, p_o74963_angle, p_o74963_randomness, Vector2(float(seed_o74963), 0.0));

	return Color(f, f, f, 1)

func scratch(uv : Vector2, size : Vector2, waviness : float, angle : float, randomness : float, pseed : Vector2) -> float:
	var subdivide : float = floor(1.0/size.x);
	var cut : float = size.x*subdivide;
	uv *= subdivide;
	var r1 : Vector2 = rand2(floorv2(uv) + pseed);
	var r2 : Vector2 = rand2(r1);
	uv = fractv2(uv);
	uv = 2.0 * uv - Vector2(1, 1);
	
	var a : float = 6.28*(angle+(r1.x-0.5)*randomness);
	var c : float = cos(a);
	var s : float = sin(a);
	
	uv = Vector2(c*uv.x+s*uv.y, s*uv.x-c*uv.y);
	uv.y += 2.0*r1.y-1.0;
	uv.y += 0.5*waviness*cos(2.0*uv.x+6.28*r2.y);
	uv.x /= cut;
	uv.y /= subdivide*size.y;
	
	return (1.0-uv.x*uv.x)*max(0.0, 1.0-1000.0*uv.y*uv.y);

func scratches(uv : Vector2, layers : int, size : Vector2, waviness : float, angle : float, randomness : float, pseed : Vector2) -> float:
	var v : float = 0.0;
	
	for i in range(layers):# (int i = 0; i < layers; ++i) {
		v = max(v, scratch(fractv2(uv + pseed), size, waviness, angle/360.0, randomness, pseed));
		pseed = rand2(pseed);

	return v;

func clampv3(v : Vector3, mi : Vector3, ma : Vector3) -> Vector3:
	v.x = clamp(v.x, mi.x, ma.x)
	v.y = clamp(v.y, mi.y, ma.y)
	v.y = clamp(v.z, mi.z, ma.z)
	
	return v


func floorv2(a : Vector2) -> Vector2:
	var v : Vector2 = Vector2()
	
	v.x = floor(a.x)
	v.y = floor(a.y)
	
	return v

func maxv2(a : Vector2, b : Vector2) -> Vector2:
	var v : Vector2 = Vector2()
	
	v.x = max(a.x, b.x)
	v.y = max(a.y, b.y)
	
	return v

func maxv3(a : Vector3, b : Vector3) -> Vector3:
	var v : Vector3 = Vector3()
	
	v.x = max(a.x, b.x)
	v.y = max(a.y, b.y)
	v.z = max(a.z, b.z)
	
	return v

func absv2(v : Vector2) -> Vector2:
	v.x = abs(v.x)
	v.y = abs(v.y)
	
	return v
	
func absv3(v : Vector3) -> Vector3:
	v.x = abs(v.x)
	v.y = abs(v.y)
	v.y = abs(v.y)
	
	return v

func cosv2(v : Vector2) -> Vector2:
	v.x = cos(v.x)
	v.y = cos(v.y)
	
	return v

func cosv3(v : Vector3) -> Vector3:
	v.x = cos(v.x)
	v.y = cos(v.y)
	v.y = cos(v.y)
	
	return v

func modv3(a : Vector3, b : Vector3) -> Vector3:
	var v : Vector3 = Vector3()
	
	v.x = modf(a.x, b.x)
	v.y = modf(a.y, b.y)
	v.z = modf(a.z, b.z)
	
	return v
	
	
func modv2(a : Vector2, b : Vector2) -> Vector2:
	var v : Vector2 = Vector2()
	
	v.x = modf(a.x, b.x)
	v.y = modf(a.y, b.y)

	return v

func modf(x : float, y : float) -> float:
	return x - y * floor(x / y)

func fractv2(v : Vector2) -> Vector2:
	v.x = v.x - floor(v.x)
	v.y = v.y - floor(v.y)
	
	return v
	
func fractv3(v : Vector3) -> Vector3:
	v.x = v.x - floor(v.x)
	v.y = v.y - floor(v.y)
	v.z = v.z - floor(v.z)
	
	return v
	
func fract(f : float) -> float:
	return f - floor(f)

func rand(x : Vector2) -> float:
	return fract(cos(x.dot(Vector2(13.9898, 8.141))) * 43758.5453);

func rand2(x : Vector2) -> Vector2:
	return fractv2(cosv2(Vector2(x.dot(Vector2(13.9898, 8.141)),
						  x.dot(Vector2(3.4562, 17.398)))) * 43758.5453);

func rand3(x : Vector2) -> Vector3:
	return fractv3(cosv3(Vector3(x.dot(Vector2(13.9898, 8.141)),
						  x.dot(Vector2(3.4562, 17.398)),
						  x.dot(Vector2(13.254, 5.867)))) * 43758.5453);

func step(edge : float, x : float) -> float:
	if x < edge:
		return 0.0
	else:
		return 1.0


#common -----

#float rand(vec2 x) {
#    return fract(cos(dot(x, vec2(13.9898, 8.141))) * 43758.5453);
#}
#
#vec2 rand2(vec2 x) {
#    return fract(cos(vec2(dot(x, vec2(13.9898, 8.141)),
#						  dot(x, vec2(3.4562, 17.398)))) * 43758.5453);
#}
#
#vec3 rand3(vec2 x) {
#    return fract(cos(vec3(dot(x, vec2(13.9898, 8.141)),
#                          dot(x, vec2(3.4562, 17.398)),
#                          dot(x, vec2(13.254, 5.867)))) * 43758.5453);
#}
#
#vec3 rgb2hsv(vec3 c) {
#	vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
#	vec4 p = c.g < c.b ? vec4(c.bg, K.wz) : vec4(c.gb, K.xy);
#	vec4 q = c.r < p.x ? vec4(p.xyw, c.r) : vec4(c.r, p.yzx);
#
#	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);
#}


#end common


func reffg():
	return false

func reff(bb):
	if bb:
		gen()