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/// GLSL CODE
/// 1st Fragment Shader
// Projects points to screen space and rotates normal
// stores output on texture
#extension GL_ARB_draw_buffers : enable
uniform float scale;
uniform vec2 canvas_size;
varying vec3 normal_vec;
varying vec3 radius_depth_w;
varying float dist_to_eye;
//varying vec2 pos;
void main(void)
{
if (radius_depth_w.x <= 0.0)
discard;
float proj_radius = radius_depth_w.x * scale / dist_to_eye;
float depth_interval = proj_radius;
vec2 screen_pos = (vec2(gl_FragCoord.xy) - vec2(0.5)) / canvas_size.xy;
//vec2 screen_pos = pos;
// First buffer : normal.x, normal.y, normal.z, radius
// Second buffer : minimum depth, depth interval, center.x, center.y
// Third buffer : color
// gl_FragData[0] = vec4 (normal_vec, radius_depth_w.x / radius_depth_w.z );
gl_FragData[0] = vec4 (normal_vec, proj_radius );
gl_FragData[1] = vec4 (radius_depth_w.y, 2.0*depth_interval, screen_pos);
}
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