Should negative width in image produce mirroring?

hamoid · December 7, 2018, 1:28pm

It’s not dw. See

processing/processing/blob/master/core/src/processing/core/PGraphics.java#L3803


}




/**
 * Draw an image(), also specifying u/v coordinates.
 * In this method, the  u, v coordinates are always based on image space
 * location, regardless of the current textureMode().
 *
 * @nowebref
 */
public void image(PImage img,
                  float a, float b, float c, float d,
                  int u1, int v1, int u2, int v2) {
  // Starting in release 0144, image errors are simply ignored.
  // loadImageAsync() sets width and height to -1 when loading fails.
  if (img.width == -1 || img.height == -1) return;


  if (imageMode == CORNER) {
    if (c < 0) {  // reset a negative width
      a += c; c = -c;
    }

It’s two uv1 and uv2 (texture coordinates). So two points defining a rectangle in the image.

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Should negative width in image produce mirroring?

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