Examples with Point2i com.xenoage.utils.math.geom.Point2i used on opensource projects

Example 1 with Point2i

use of com.xenoage.utils.math.geom.Point2i in project Zong by Xenoage.

the class PageViewManagerTest method computeScreenPosition.

@Test
public void computeScreenPosition() {
    Size2i viewSize = new Size2i(800, 600);
    float viewScaling = 1;
    Point2f viewScroll = new Point2f(0, 0);
    ViewState viewState = new ViewState(viewSize, viewScaling, viewScroll);
    // center point of the page must have screen coordinates 400/300
    Point2i pos = view.computePositionPx(layoutPos(null, 0, p(50, 100)), viewState);
    assertEquals(pos.x, 400);
    assertEquals(pos.y, 300);
    // set zoom to 200%, must still be 400/300
    viewScaling = 2;
    viewState = new ViewState(viewSize, viewScaling, viewScroll);
    pos = view.computePositionPx(layoutPos(null, 0, p(50, 100)), viewState);
    assertEquals(pos.x, 400);
    assertEquals(pos.y, 300);
    // scroll to -5/10
    // page point 45/110 must be 400/300
    viewScroll = new Point2f(-5, 10);
    viewState = new ViewState(viewSize, viewScaling, viewScroll);
    pos = view.computePositionPx(layoutPos(null, 0, p(45, 110)), viewState);
    assertEquals(pos.x, 400);
    assertEquals(pos.y, 300);
    // page center point must be
    // 400-(-5*MmToPx*zoom); 300-(10*MmToPx*zoom)
    pos = view.computePositionPx(layoutPos(null, 0, p(50, 100)), viewState);
    assertEquals(pos.x, Math.round(400 - Units.mmToPx(-5, viewScaling)));
    assertEquals(pos.y, Math.round(300 - Units.mmToPx(10, viewScaling)));
}

Example 2 with Point2i

use of com.xenoage.utils.math.geom.Point2i in project Zong by Xenoage.

the class PageViewManagerTest method computeLayoutPosition.

@Test
public void computeLayoutPosition() {
    Size2i viewSize = new Size2i(800, 600);
    float viewScaling = 1;
    Point2f viewScroll = new Point2f(0, 0);
    ViewState viewState = new ViewState(viewSize, viewScaling, viewScroll);
    // default zoom and scroll: point 400/300 must
    // have center position of the page (50/100)
    Point2f pos = view.computeLP(new Point2i(400, 300), viewState).position;
    assertEquals(pos.x, 50, Delta.DELTA_FLOAT);
    assertEquals(pos.y, 100, Delta.DELTA_FLOAT);
    // set zoom to 200%, must still be 50/100
    viewScaling = 2;
    viewState = new ViewState(viewSize, viewScaling, viewScroll);
    pos = view.computeLP(new Point2i(400, 300), viewState).position;
    assertEquals(pos.x, 50, Delta.DELTA_FLOAT);
    assertEquals(pos.y, 100, Delta.DELTA_FLOAT);
    // scroll to -5/10
    // screen point 400/300 must be 45/110
    viewScroll = new Point2f(-5, 10);
    viewState = new ViewState(viewSize, viewScaling, viewScroll);
    pos = view.computeLP(new Point2i(400, 300), viewState).position;
    assertEquals(pos.x, 45, Delta.DELTA_FLOAT);
    assertEquals(pos.y, 110, Delta.DELTA_FLOAT);
    // screen point 0/0 must be
    // 50+(-5-400*pxToMm/zoom);100+(10-300*pxToMm/zoom)
    // compute relative to page 0, since coordinates are outside
    pos = view.computeLP(new Point2i(0, 0), 0, viewState).position;
    assertEquals(pos.x, 50 + -5 - Units.pxToMm(400, viewScaling), Delta.DELTA_FLOAT);
    assertEquals(pos.y, 100 + 10 - Units.pxToMm(300, viewScaling), Delta.DELTA_FLOAT);
    // when not computed relative to a given page, it must return null
    assertNull(view.computeLP(new Point2i(0, 0), viewState));
    // reset zoom/scroll, then screen point 800/300 must be on page 1
    viewScaling = 1;
    viewScroll = new Point2f(0, 0);
    viewState = new ViewState(viewSize, viewScaling, viewScroll);
    int pageIndex = view.computeLP(new Point2i(800, 300), viewState).pageIndex;
    assertEquals(1, pageIndex);
}