try using a triangle-strip-based mesh to save space and possibly improve performance

Author: 10110111

models/moon-vertices-indices.bin.7z

@@ -62,6 +62,7 @@
 #include <QVarLengthArray>
 #include <QOpenGLBuffer>
 #include <QOpenGLContext>
+#include <QOpenGLFunctions_3_3_Core>
 #include <QOpenGLVertexArrayObject>
 #ifdef DEBUG_SHADOWMAP
 #include <QOpenGLFramebufferObject>
@@ -5139,7 +5140,13 @@ bool Planet::drawMoon(const StelPainterLight& light, StelPainter& painter)
 	gl->glClear(GL_DEPTH_BUFFER_BIT);
 
 	bindMoonVAO();
-	GL(gl->glDrawElements(GL_TRIANGLES, model.indexArr.size(), GL_UNSIGNED_INT, reinterpret_cast<void*>(indicesOffset)));
+	// Use primitive restart if we support it, and accept the artifacts that will appear if we don't
+	if (const auto gl33 = StelOpenGL::highGraphicsFunctions())
+	{
+		GL(gl->glEnable(GL_PRIMITIVE_RESTART));
+		GL(gl33->glPrimitiveRestartIndex(UINT_MAX));
+	}
+	GL(gl->glDrawElements(GL_TRIANGLE_STRIP, model.indexArr.size(), GL_UNSIGNED_INT, reinterpret_cast<void*>(indicesOffset)));
 	releaseMoonVAO();
 
 	GL(moonShaderProgram->release());