Evaluate()

NodeOutput TextureNode::Evaluate ( NodeInputParam  input, NodeEditorPin *  pin  )

virtual

Implements NodeEditorNode.

Definition at line 21 of file TextureNode.cpp.

{
    if (isDefault)
        return NodeOutput({0.0f});
    float res, sc, x, y;
    res = sc = x = y = 0.0f;
    int channel = 0;
 
    if (pin->id == outputPins[0]->id)
    {
        channel = 0;
    }
 
    else if (pin->id == outputPins[1]->id)
    {
        channel = 1;
    }
 
    else if (pin->id == outputPins[2]->id)
    {
        channel = 2;
    }
 
    if (inputPins[0]->IsLinked())
    {
        x = inputPins[0]->other->Evaluate(input).value;
    }
 
    else
    {
        x = input.texX;
    }
 
    if (inputPins[1]->IsLinked())
    {
        y = inputPins[1]->other->Evaluate(input).value;
    }
 
    else
    {
        y = input.texY;
    }
 
    if (inputPins[2]->IsLinked())
    {
        sc = inputPins[2]->other->Evaluate(input).value;
    }
 
    else
    {
        sc = scale;
    }
 
    x = (x * 2.0f - 1.0f) * sc - posi[0];
    y = (y * 2.0f - 1.0f) * sc - posi[1];
    float cr = cos(rota * 3.1415926535f / 180.0f);
    float sr = sin(rota * 3.1415926535f / 180.0f);
    float tx = x;
    float ty = y;
    x = tx * cr - ty * sr;
    y = tx * sr + ty * cr;
    x = x * 0.5f + 0.5f;
    y = y * 0.5f + 0.5f;
 
    if(!autoTiled)
    {
        if(x > numTiles || y > numTiles || x < 0 || y < 0)
            return NodeOutput({ 0.0f });
    }
 
    x = fract(x);
    y = fract(y);
    mutex.lock();
    int xC = (int)(x * (texture->GetWidth()-1));
    int yC = (int)(y * (texture->GetHeight()-1));
    unsigned char elevC = texture->GetData()[yC * texture->GetWidth() * 3 + xC * 3 + channel];
    res = (float)elevC / 256;
 
    if(npScale)
    {
        res = res * 2.0f - 1.0f;
    }
 
    if(inv)
    {
        res = 1.0f - res;
    }
 
    mutex.unlock();
    return NodeOutput({ res });
}