setDrawBounds()

void fl::XYPathRenderer::setDrawBounds	(	uint16_t	width,
		uint16_t	height )

Definition at line 92 of file xypath.cpp.

                                                                  {
    // auto &tx = *(mGridTransform.mImpl);
    auto &tx = mGridTransform;
 
    // 1) map world‑X ∈ [–1..+1] → pixel‑X ∈ [0.5 .. width–0.5]
    //    scale_x  = ( (width–0.5) – 0.5 ) / 2 = (width–1)/2
    //    offset_x = (width–0.5 + 0.5) / 2 = width/2
    tx.set_scale_x((width - 1.0f) * 0.5f);
    // tx.scale_x = (width - 1.0f) * 0.5f;
    // tx.offset_x = width * 0.5f;
    tx.set_offset_x(width * 0.5f);
 
    // 2) map world‑Y ∈ [ -1 .. 1 ] → pixel‑Y ∈ [0.5 .. height–0.5]
    //    (your LinePath lives at Y=0, so it will sit at row‑0 center = 0.5)
    //    scale_y  = (height–0.5) – 0.5     = height–1
    //    offset_y = 0.5
    // tx.scale_y = (height - 1.0f) * 0.5f;
    // tx.offset_y = height * 0.5f;
 
    tx.set_scale_y((height - 1.0f) * 0.5f);
    tx.set_offset_y(height * 0.5f);
 
    onTransformFloatChanged();
    mDrawBoundsSet = true;
}

References mDrawBoundsSet, mGridTransform, and onTransformFloatChanged().

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