File: isolines.tcs

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qt6-3d 6.8.2%2Bdfsg-2
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#version 400 core

layout( vertices = 4 ) out;

uniform float outer[4] = float[]( 1.0, 1.0, 1.0, 1.0 );

void main()
{
    // Pass along the vertex position unmodified
    gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;

    // Set the tessellation levels
    gl_TessLevelOuter[0] = outer[0]; // number of isolines
    gl_TessLevelOuter[1] = outer[1]; // divisions along isoline
}