material-maker/addons/material_maker/nodes/shape.mmg

{
	"name": "shape",
	"node_position": {
		"x": 0,
		"y": 0
	},
	"parameters": {
		"edge": 0.2,
		"radius": 1,
		"shape": 0,
		"sides": 3
	},
	"shader_model": {
		"global": "float shape_circle(vec2 uv, float sides, float size, float edge) {\n    uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n    float distance = length(uv);\n    return clamp((1.0-distance/size)/edge, 0.0, 1.0);\n}\n\nfloat shape_polygon(vec2 uv, float sides, float size, float edge) {\n    uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n    float angle = atan(uv.x, uv.y)+3.14159265359;\n    float slice = 6.28318530718/sides;\n    return clamp((size-cos(floor(0.5+angle/slice)*slice-angle)*length(uv))/(edge*size), 0.0, 1.0);\n}\n\nfloat shape_star(vec2 uv, float sides, float size, float edge) {\n    uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n    float angle = atan(uv.x, uv.y);\n    float slice = 6.28318530718/sides;\n    return clamp((size-cos(floor(1.5+angle/slice-2.0*step(0.5*slice, mod(angle, slice)))*slice-angle)*length(uv))/(edge*size), 0.0, 1.0);\n}\n\nfloat shape_curved_star(vec2 uv, float sides, float size, float edge) {\n    uv = 2.0*uv-1.0;\n\tedge = max(edge, 1.0e-8);\n    float angle = 2.0*(atan(uv.x, uv.y)+3.14159265359);\n    float slice = 6.28318530718/sides;\n    return clamp((size-cos(floor(0.5+0.5*angle/slice)*2.0*slice-angle)*length(uv))/(edge*size), 0.0, 1.0);\n}\n\nfloat shape_rays(vec2 uv, float sides, float size, float edge) {\n    uv = 2.0*uv-1.0;\n\tedge = 0.5*max(edge, 1.0e-8)*size;\n\tfloat slice = 6.28318530718/sides;\n    float angle = mod(atan(uv.x, uv.y)+3.14159265359, slice)/slice;\n    return clamp(min((size-angle)/edge, angle/edge), 0.0, 1.0);\n}\n\n",
		"instance": "",
		"name": "Shape",
		"outputs": [
			{
				"f": "shape_$(shape)($(uv), $(sides), $(radius), $(edge))"
			}
		],
		"parameters": [
			{
				"default": 0,
				"label": "",
				"name": "shape",
				"type": "enum",
				"values": [
					{
						"name": "Circle",
						"value": "circle"
					},
					{
						"name": "Polygon",
						"value": "polygon"
					},
					{
						"name": "Star",
						"value": "star"
					},
					{
						"name": "Curved star",
						"value": "curved_star"
					},
					{
						"name": "Rays",
						"value": "rays"
					}
				]
			},
			{
				"default": 3,
				"label": "",
				"max": 32,
				"min": 2,
				"name": "sides",
				"step": 1,
				"type": "float"
			},
			{
				"default": 1,
				"label": "",
				"max": 1,
				"min": 0,
				"name": "radius",
				"step": 0,
				"type": "float"
			},
			{
				"default": 0.2,
				"label": "",
				"max": 1,
				"min": 0,
				"name": "edge",
				"step": 0,
				"type": "float"
			}
		]
	}
}