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Improve performance by aggressively merging meshes#94
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@Birdy2014 can check tomorrow. |
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Tested on Windows: |
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So I'm procrastinating learning for exams again and decided to finally improve the performance of this program.
With this PR, instead of rendering only one diffuse and opacity texture per mesh, up to 16 can be drawn. This allows more meshes to be merged per node and reduces the amount of meshes from 4980 to 1356 for the city model. The per-core CPU load is reduced from 160% to 100% on my machine.
There is one drawback: Indexing an array using a vertex attribute may not be legal in GLSL (but it works for me), so I would need to replace that with some ugly loop if it doesn't work for you.
So, please test this PR on Windows and MacOS, but since this project is long over, this PR will probably stay open forever.