Fix OpenGL vs local axis issue

- World coordinates is positive x to the left, positive y inwards,
  positive z upwards

All math before sending data to OpenGL happens in these world
coordinates. For example, curr_chunk is in world coordinates. chunk
coordinates are also in world system. Only when we get/set data to
OpenGL functions do we perform the 2 step translation

- world y is negated and
- then flipped with world z

so { x, y, z } --> { x, z, -y } basically.

These translations are done for example when in the chunk->model
translation, converting camera coordinates (that are in opengl coords)
to world coords for curr_chunk data, and setting vertex positions in
chunk_load. These have been marked with "//OpenGL FLIP" so it's easy to
find

0 files changed, 0 insertions, 0 deletions