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Quellcode

A        B
 
     *

C        D

Quellcode

float CQTLevel::GetTerrainHeight(float X,float Z)
{
    if (X < 0 || X > 128 || Z < 0 || Z > 128)
        return 0.0f;

    int rx = static_cast <int> (X);
    int ry = static_cast <int> (Z);
    float fx = X - rx;
    float fy = Z - ry;

    float A = float(HeightMap[rx + ry * 128])/10.0f;
    float B = float(HeightMap[(rx+1) + ry * 128])/10.0f;
    float C = float(HeightMap[rx + (ry+1) * 128])/10.0f;
    float D = float(HeightMap[(rx+1) + (ry+1) * 128])/10.0f;

    return (A + (B -A) * fx) + ((C + (D - C) * fx) - (A + (B - A) * fx)) * fy;
}