36 lines
922 B
Python
36 lines
922 B
Python
|
$input v_view, v_world
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 2011-2016 Branimir Karadzic. All rights reserved.
|
||
|
|
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <bgfx_shader.sh>
|
||
|
|
|
||
|
|
uniform vec4 u_params[4];
|
||
|
|
|
||
|
|
#define u_lightDir u_params[0].xyz
|
||
|
|
#define u_shininess u_params[0].w
|
||
|
|
#define u_skyColor u_params[1].xyz
|
||
|
|
#define u_groundColor u_params[2].xyz
|
||
|
|
#define u_matColor u_params[3]
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
vec3 normal = normalize(cross(dFdx(v_world), dFdy(v_world) ) );
|
||
|
|
vec3 viewDir = -normalize(v_view);
|
||
|
|
|
||
|
|
float ndotl = dot(normal, u_lightDir);
|
||
|
|
vec3 diffuse = mix(u_groundColor, u_skyColor, ndotl*0.5 + 0.5) * u_matColor.xyz;
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
vec3 reflected = 2.0*ndotl*normal - u_lightDir;
|
||
|
|
float rdotv = dot(reflected, viewDir);
|
||
|
|
float spec = step(0.0, ndotl) * pow(max(0.0, rdotv), u_shininess);
|
||
|
|
#else
|
||
|
|
float spec = 0.0;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
gl_FragColor = vec4(diffuse + vec3_splat(spec), u_matColor.w);
|
||
|
|
}
|