Posted by yaqiang on Aug 10, 2022; 3:33am
URL: https://forum.jogamp.org/Runtime-switch-bewteen-orthographic-and-perspective-projections-tp4041812.html

3D rendering class of Plot3DGL which implemented GLEventListener interface in MeteoInfo support both orthographic and perspective projections in "reshape" method (https://github.com/meteoinfo/MeteoInfo/blob/master/meteoinfo-chart/src/main/java/org/meteoinfo/chart/jogl/Plot3DGL.java#L4290-L4330). "orthgraphic" is a boolean variable to control it throught the public method "setOrthographic" (https://github.com/meteoinfo/MeteoInfo/blob/master/meteoinfo-chart/src/main/java/org/meteoinfo/chart/jogl/Plot3DGL.java#L971-L980). The problem is that I have to resize the plot panel which trigger the "reshape" method to plot the 3D graphics in correct projections after "setOrthographic" method was called.

So I tried to add "updateProjections" method to change the projection (https://github.com/meteoinfo/MeteoInfo/blob/master/meteoinfo-chart/src/main/java/org/meteoinfo/chart/jogl/Plot3DGL.java#L4332-L4367). This method was tried to called in "setOrthographic" method to update and plot graphics in new projections. But I got error of "javax.media.opengl.GLException: No OpenGL context current on this thread" with the code "glu.gluPerspective(45.0f, 1.0f, near, far);" in the "updateProjections" method.

GLUgl2 was also tested but with same error result.

Any help is appreciated!