openframeworks / openframeworks/openFrameworks
[ios simulator] - setupScreenPerspective failing with a NaN
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- C++
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Description
it seems a variable called float aspect becomes a NaN after a division by zero
it seems this piece of code is returning some weird values (probably uninitialized memory) on simulator
ofRectangle ofGLRenderer::getNativeViewport() const {
GLint viewport[4]; // Where The Viewport Values Will Be Stored
glGetIntegerv(GL_VIEWPORT, viewport);
it seems glGetIntegerv(GL_VIEWPORT, viewport); and it is not changing values in array
returning one arbitrary rectangle
steps to reproduce:
just test an empty project on simulator
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Research direction
Start with ofGLRenderer::getNativeViewport and the setupScreenPerspective path, then reproduce the failure with an empty project in the iOS simulator. Inspect the values returned by glGetIntegerv(GL_VIEWPORT, viewport) and verify that the viewport is valid before aspect is calculated; done means the empty project no longer produces a NaN perspective on the simulator.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp, ios
- Domain
- computer-graphics, mobile-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100