39 lines
784 B
Python
39 lines
784 B
Python
$input v_texcoord0
|
|
|
|
/*
|
|
* Copyright 2014-2015 Dario Manesku. All rights reserved.
|
|
* License: http://www.opensource.org/licenses/BSD-2-Clause
|
|
*/
|
|
|
|
#include <bgfx_shader.sh>
|
|
|
|
uniform vec4 u_imageLodEnabled;
|
|
SAMPLERCUBE(s_texColor, 0);
|
|
|
|
#define u_imageLod u_imageLodEnabled.x
|
|
#define u_imageEnabled u_imageLodEnabled.y
|
|
|
|
vec3 vecFromLatLong(vec2 _uv)
|
|
{
|
|
float pi = 3.14159265;
|
|
float twoPi = 2.0*pi;
|
|
float phi = _uv.x * twoPi;
|
|
float theta = _uv.y *pi;
|
|
|
|
vec3 result;
|
|
result.x = sin(theta)*cos(phi);
|
|
result.y = cos(theta);
|
|
result.z = -sin(theta)*sin(phi);
|
|
|
|
return result;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec3 dir = vecFromLatLong(v_texcoord0);
|
|
vec3 color = textureCubeLod(s_texColor, dir, u_imageLod).xyz;
|
|
float alpha = 0.2 + 0.8*u_imageEnabled;
|
|
|
|
gl_FragColor = vec4(color, alpha);
|
|
}
|