[SOLVED] Maybe bugs in canvas.getLineIntersection() and canvas.getPolygonIntersection()

[cinetec_tech]

Hi,

 

    When I add lines into canvas, there are two ways to setup the position of the points. First, set local coordinate to line point through 'canvas.addLinePoint()', then set transform to canvas through 'canvas.addTransform()'; Second, calculate screen position=transform*local coordinate, then set screen position to line point through 'canvas.addLinePoint()'. The first way, I cannot get intersection with lines through 'canvas.getLineIntersection()'. The second way, it works.

 

    There are two examples in attach files. 'canvas_03' shows the first way. 'canvas_04' shows the second way.

canvas_03.cpp

canvas_03.world

canvas_04.cpp

canvas_04.world

[cinetec_tech]

a little changes in canvas_04.cpp

canvas_04.cpp

[silent]

Hi,

 

I've passed this information to the developers. I will answer you as soon as I will get any feedback.

 

Thanks!

[silent]

Hi,

 

Just got response from the devs.

 

Perspective projections doesn't work with intersections. The only way of getting correct intersction results is to pass coordinates like you did it in canvas_04 sample.

 

Thanks!

[frustum]

Canvas will support intersections with perspective transformatated elements next update.