Clutteroad

So as expected, I gave Clutter 0.8 a little test drive. Literally... =)



Going to add a bit more eye candy in there and push Clutter API further, we'll see what comes out. Currently the biggest problem is collision detection, tried to utilize:

  • clutter_stage_get_actor_at_pos() - Separated road & background into own images/actors, but having a problem that clutter_stage_get_actor_at_pos() doesn't seem to ignore the transparent part of the image in picking.

  • clutter_stage_read_pixels() - The RGBA color could be used to see if car is on grass (green) or on road (brown). But for some reason the outcome was not clear, even when making sure the pixel is taken next to car (not _from_ the car) and driving on top of a black&white chess board...


Collisions to other cars etc. should not be a problem with clutter_stage_get_actor_at_pos() but what could be cleanest way to detect the track? Flash has hitTest for this.

Comments

Post a Comment

Popular posts from this blog

Qt 5.10 QML Shape testing

Image
When implementing component into QtQuick UI which needs something more than rectangles, images and texts, pure declarative QML hasn't been enough. Popular choices to use for items with some sort of vector drawing are QML Canvas , QQuickPaintedItem  or QNanoPainter . But with Qt 5.10 there will be supports for new Shape  element with paths that contain lines, quads, arcs etc. so I decided to install Qt 5.10 beta3 and implement all tests of "qnanopainter_vs_qpainter_demo" with also QML + Shape elements. ( This kinda makes it "qnanopainter_vs_qpainter_vs_qmlshape_demo" but not renaming now ). So here is in all glory the same UI implemented with QNanoPainter (left), QQuickPaintedItem (center), and QML+Shape (right): Hard to spot the differences right? If only there would be a way to prove this, some way to x-ray into these UIs... like QSG_VISUALIZE=overdraw  to visualize what Qt Quick Scene Graph Renderer sees? Here you can see that scene graph sees QNan
Read more

Qt 5.10 Rendering Benchmarks

Image
Qt 5.10.0 RC packages are available now and actual release is happening pretty soon. So this seems to be a good time to run some rendering benchmarks with 5.10, including new QML Shape element, QQuickPaintedItem and QNanoPainter . After my previous blog post , some initial comments mentioned how QML Shape didn't reach their performance expectations. But I think that might be more of a "use the right tool for the job" -kind of thing. This demo application is very much designed to test the limits of how much heavily animated graphics can be drawn while keeping performance high and while having its own strengths, QML Shape likely isn't the tool for that. To prove this point, there is a new ' flower ' test case in QNanoPainter demo app which renders a nice flower path, animating gradient color & rotation (but not path). Combining it with new setting to render multiple items (not just multiple renders per item) and the outcome looks like this with 1 and 1
Read more

Qt Quick 3D DynamicMeters demo

Image
Lately we have been working to perfect the Qt Quick 3D for the 5.15 release. There are still some tweaking to do, but things are looking pretty nice already! In order to prove (to ourselves and to others) that Quick 3D is ready for the prime time, we have also been implementing some demos with it. Tomi already made a blog post about Quick 3D Benchmarking demo here , go check it out if you haven't already. This benchmarking application can be used to test many features of Quick 3D and to evaluate how different hardware can handle the load when the model count, complexity, texture sizes etc. are increased. Another demo we have prepared is called DynamicMeters. The main targets of this demo were: Demonstrate how Quick 3D and Qt Quick (2D) can easily be combined into single UX. While 3D is great, most applications want to combine also traditional 2D elements in different ways. Test how Quick 3D works together with 3rd party OpenGL libraries. Make sure that the performance is
Read more