45 lines
1.1 KiB
Scala
45 lines
1.1 KiB
Scala
$input a_position, a_normal, a_tangent, a_texcoord0
|
|
$output v_wpos, v_view, v_normal, v_tangent, v_bitangent, v_texcoord0
|
|
|
|
/*
|
|
* Copyright 2011-2019 Branimir Karadzic. All rights reserved.
|
|
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
|
|
*/
|
|
|
|
#include "../common/common.sh"
|
|
|
|
mat3 mtx3FromCols(vec3 c0, vec3 c1, vec3 c2)
|
|
{
|
|
#ifdef BGFX_SHADER_LANGUAGE_GLSL
|
|
return mat3(c0, c1, c2);
|
|
#else
|
|
return transpose(mat3(c0, c1, c2));
|
|
#endif
|
|
}
|
|
|
|
void main()
|
|
{
|
|
vec3 wpos = mul(u_model[0], vec4(a_position, 1.0) ).xyz;
|
|
v_wpos = wpos;
|
|
|
|
gl_Position = mul(u_viewProj, vec4(wpos, 1.0) );
|
|
|
|
vec4 normal = a_normal * 2.0 - 1.0;
|
|
vec4 tangent = a_tangent * 2.0 - 1.0;
|
|
|
|
vec3 wnormal = mul(u_model[0], vec4(normal.xyz, 0.0) ).xyz;
|
|
vec3 wtangent = mul(u_model[0], vec4(tangent.xyz, 0.0) ).xyz;
|
|
|
|
v_normal = normalize(wnormal);
|
|
v_tangent = normalize(wtangent);
|
|
v_bitangent = cross(v_normal, v_tangent) * tangent.w;
|
|
|
|
mat3 tbn = mtx3FromCols(v_tangent, v_bitangent, v_normal);
|
|
|
|
// eye position in world space
|
|
vec3 weyepos = mul(vec4(0.0, 0.0, 0.0, 1.0), u_view).xyz;
|
|
// tangent space view dir
|
|
v_view = mul(weyepos - wpos, tbn);
|
|
v_texcoord0 = a_texcoord0;
|
|
}
|