AutoUV shaders [updated: 05/13/2020]

[linkoboy]

Hi everybody,

If you are interesting to have a shader that show normal like in this picture :



I'll share to you this two files that I've modified from wings 3d 1.5.4 :
vertex_color.vs and vertex_color.fs.

I put some objects, a torus a sphere and a cone on the [X-Z] ground.
Link to the test scene : test_norlmal.wings

For me, the up axis is [Y]. I'm still using Wings 3D v1.5.4.

I've taken this shaders : vextex_colors.vs and vertex_colors.fs and just modified a little to have this result (see attached result.png)

Here is the shaders :

Vertex shader : vertex_color.vs

Code:

varying vec3 VertexColor;
uniform int  Flag;

void main()
{
    VertexColor = gl_Normal;
    gl_Position = gl_ProjectionMatrix * gl_ModelViewMatrix * gl_Vertex;
}

Fragment shader : vertex_color.fs

Code:

varying vec3 VertexColor;

void main()
{
    bool flipX = false;
    bool flipZ = true;
    
    vec4 color = vec4((1.0 + VertexColor) / 2.0, 1.0);
    
    gl_FragColor.r = flipX ? 1.0 - color.r : color.r;
    gl_FragColor.g = flipZ ? 1.0 - color.b : color.b;
    gl_FragColor.b = color.g;
}

If you want flip the colors in X or Z axis, you can just trick the boolean to have the desired result.

Best regards