three
Version:
JavaScript 3D library
36 lines (21 loc) • 794 B
JavaScript
export default /* glsl */`
// Workaround for Adreno/Nexus5 not able able to do dFdx( vViewPosition ) ...
vec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );
vec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );
vec3 normal = normalize( cross( fdx, fdy ) );
vec3 normal = normalize( vNormal );
normal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
vec3 tangent = normalize( vTangent );
vec3 bitangent = normalize( vBitangent );
tangent = tangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
bitangent = bitangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
`;