Edge blending shift

[colinbouvry]

Hello Paul,
I needed to shift edge blending to adjust easily
I added
mShader->uniform( "uShift", mShift + vec4(-mX1, -mY1, 1.f - mX2, 1.f - mY2) );
because with this code it did not worked with edge
warp->draw(texture, m_oSrcArea);

but with this, It worked !
warp->begin(); gl::draw(texture, m_oSrcArea, warp->getBounds()); warp->end();
`

Perhaps we should add this method into WarpPerspective class ?
void setTexCoords( float x1, float y1, float x2, float y2 );
Thanks for this nice block !

[paulhoux]

Thanks Colin, I'll have a look. Not sure if "shift" is the best name for it, though. "Offset" would sound more appropriate, but perhaps we should allow to set the texcoords directly and make sure the edge blending takes them into account.

[colinbouvry]

I hesitated between shift and offset !
Ok for Offset !
How to set the texcoords directly ? Using uEdges ?

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