/*{
    "CATEGORIES": [
        "Distortion Effect"
    ],
    "CREDIT": "VIDVOX",
    "DESCRIPTION": "Warps an image to fit in a triangle by fitting the height of the image to the height of a triangle",
    "INPUTS": [
        {
            "NAME": "inputImage",
            "TYPE": "image"
        },
        {
            "DEFAULT": [
                0.5,
                1
            ],
            "MAX": [
                1,
                1
            ],
            "MIN": [
                0,
                0
            ],
            "NAME": "peakPoint",
            "TYPE": "point2D"
        },
        {
            "DEFAULT": 0,
            "MAX": 1,
            "MIN": 0,
            "NAME": "distortX",
            "TYPE": "float"
        }
    ],
    "ISFVSN": "2"
}
*/

void main()	{
	vec4		inputPixelColor = vec4(0.0);
	vec2		pt = isf_FragNormCoord;
	float		val = 0.0;
	
	if (pt.x < peakPoint.x)	{
		pt.x = pt.x * 0.5 / peakPoint.x;
		val = 2.0 * pt.x * peakPoint.y;
	}
	else	{
		pt.x = 0.5 + 0.5 * (pt.x - peakPoint.x) / (1.0 - peakPoint.x);
		val = (2.0 - 2.0 * pt.x) * peakPoint.y;
	}
	if (pt.y <= val)	{
		pt.x = mix(isf_FragNormCoord.x,pt.x,distortX);
		pt.y /= val;
		inputPixelColor = IMG_NORM_PIXEL(inputImage, pt);
	}
	
	gl_FragColor = inputPixelColor;
}