Texture2D.cc

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#include <esg/texture/Texture2D.h>

using namespace esg;

void Texture2D::_delete_texture(void)
{
    if (_texture) 
        for (unsigned i = 0; i < _height; i++) delete [] _texture[i];
    delete [] _texture;
}

void Texture2D::_allocate_texture(unsigned w, unsigned h)
{
    _delete_texture();
    _width   = w;
    _height  = h;
#ifdef WIN32
        _texture = (Color3f**) malloc(_height * sizeof(Color3f*));
#else
        _texture = new Color3f* [_height];
#endif
    for (unsigned i = 0; i < _height; i++)
        _texture[i] = new Color3f [_width];
}



bool Texture2D::value(unsigned row, unsigned col, Color3f& c) const
{
    if (_texture && row < _height && col < _width) {
        c.set(_texture[row][col]);
        return true;
    }
    return false;
}

bool Texture2D::mapUV(float u, float v, Color3f& c) const
{
    if (!_texture) return false;
    c.set(_texture [(unsigned)(fabs(_height*(v-(int)v)))] [(unsigned)(fabs(_width*(u-(int)u)))]);
    return true;
}

bool Texture2D::mapXYZ(float x, float y, float z, Color3f& c) const
{
    return false;
}

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