isf 0.1.0

Parsing, Deserialization and Serialization of the Interactive Shader Format.
Documentation 
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/*{
    "CATEGORIES": [
        "Distortion Effect"
    ],
    "CREDIT": "VIDVOX",
    "DESCRIPTION": "Maps video onto a sphere",
    "INPUTS": [
        {
            "NAME": "inputImage",
            "TYPE": "image"
        },
        {
            "DEFAULT": 0.5,
            "LABEL": "Image Scale",
            "MAX": 1,
            "MIN": 0.125,
            "NAME": "imageScale",
            "TYPE": "float"
        },
        {
            "DEFAULT": 1,
            "LABEL": "Radius Scale",
            "MAX": 1.999,
            "MIN": 0,
            "NAME": "radiusScale",
            "TYPE": "float"
        },
        {
            "DEFAULT": [
                0,
                0
            ],
            "LABEL": "Rotate",
            "MAX": [
                1,
                1
            ],
            "MIN": [
                0,
                0
            ],
            "NAME": "pointInput",
            "TYPE": "point2D"
        }
    ],
    "ISFVSN": "2"
}
*/



const float pi = 3.14159265359;


void main()	{
	vec4		inputPixelColor = vec4(0.0);
	vec2		rotate = pointInput;
 	vec2 		p = 2.0 * isf_FragNormCoord.xy - 1.0;
 	float		aspect = RENDERSIZE.x / RENDERSIZE.y;
 	p.x = p.x * aspect;
 	
 	float		r = sqrt(dot(p,p)) * (2.0-radiusScale);
 	if (r < 1.0)	{
		vec2 uv;
    	float f = imageScale * (1.0-sqrt(1.0-r))/(r);
    	uv.x = mod(p.x*f + rotate.x,1.0);
    	uv.y = mod(p.y*f + rotate.y,1.0);
    	inputPixelColor = IMG_NORM_PIXEL(inputImage, uv);
	}


	//	both of these are also the same
	//inputPixelColor = IMG_NORM_PIXEL(inputImage, loc);
	
	gl_FragColor = inputPixelColor;
}