Peter Gasparovic

André, thank you for your effort. At least you helped me to locate the cause. I will try to use v6.32 with my trick, because I can't hope for replacement of 25 computers because of problems with the single program. There are different programs used on these computers (Ansys, Siemens NX, PTC Creo), but none has problems with 3D graphics.

In v6.39, I am not able to use my trick to display panels (as I did in v6.32). Neither Light=off nor Axes=off help to display panels. http://people.tuke.sk/peter.gasparovic/pokus/xflr5_v639_opengl/ Even Clipping plane settings to the full right doesn't help. Yo can see in Clipboard 1 that with Light=on the surface is actually shaded in black color (different black color than of the background). Clipboards 6 and 7 shows clipped view from the right and left side of aeroplane. The clipping works as...

These old computers are in the university classroom. They have latest drivers for these chipsets. I have made screenshots They are self-explanatory - the changes of display are caused only by settings of "Light" and "Axes". http://people.tuke.sk/peter.gasparovic/pokus/xflr5_v632_opengl/

Here it is: XFLR5 v6.32 context 2.1 Context information Vendor: Intel Renderer: Intel(R) Q45/Q43 Express Chipset OpenGL version: 2.1.0 - Build 8.15.10.2302 GLSL version: 1.20 - Intel Build 8.15.10.2302 context 3.0 Context information Vendor: Intel Renderer: Intel(R) Q45/Q43 Express Chipset OpenGL version: 2.1.0 - Build 8.15.10.2302 GLSL version: 1.20 - Intel Build 8.15.10.2302 context 4.5 Context information Vendor: Intel Renderer: Intel(R) Q45/Q43 Express Chipset OpenGL version: 2.1.0 - Build 8.15.10.2302...

I have troubles viewing airplane in 3D view. Problem appears in all computers with Intel Q45 chipset (with graphics accelerator) - computers are 9 years old. Viewing the wing in Plane/edit is OK, but viewing the whole airplane in 3D view is problem. I see only outline with black fill - no surface, no pannels, and sometime no axes. In version 6.32 I was able to make it work by turning Lights off (3D light options), and by turnix Axes off. Then I can see panels, surfaces and outlines as I wish. However...

I confirm, that your example is correctly solved in Maxima 5.21.1. Problem with solve...

I confirm, that your example is correctly solved in Maxima 5.21.1. Problem with solve...

Me and my students had a difficulty too. Now I can see where is the problem. Description...