$input v_color0, v_texcoord0

#include "../../common/common.sh"

SAMPLERCUBE(s_texColor, 0);

uniform vec4 u_params;

#define u_distanceMultiplier     u_params.y

void main()
{	
	vec4 color = textureCube(s_texColor, v_texcoord0.xyz);
	int index = int(v_texcoord0.w*4.0 + 0.5);
	float rgba[4];
	rgba[0] = color.z;
	rgba[1] = color.y;
	rgba[2] = color.x;
	rgba[3] = color.w;
	float distance = rgba[index];

	float smoothing = 16.0 * length(fwidth(v_texcoord0.xyz)) / sqrt(2.0) * u_distanceMultiplier;

	float alpha = smoothstep(0.5 - smoothing, 0.5 + smoothing, distance);
	vec4 sdfColor = vec4(v_color0.xyz, alpha * v_color0.w);
	gl_FragColor = sdfColor;
}