Checking `<= x + w` causes off-by-one error where `CheckCollisionPointRec` will return true at the same time for two rectangles rendered right next to each, but which don't overlap (e.g. when making a 2D tile editor). This is clearly not what was intended.
When `i` starts with `0`, `t` is also `0`, which results in `previous == startPos == current`, this segment is not only redundant, but it also causes division-by-zero since `sqrtf(dx*dx + dy*dy)` is zero.
This simplification will allow the usage of `rshapes` as STANDALONE mode in a future. Only a small set of `rlgl` functions are required and they can be "more" easely replaced if no `rlPushMatrix()`/`rlPopMatrix()` are involved.
More simplification planned for the future, maybe the textures dependencies.
Allow to choose which modules are compiled with raylib, if some modules are excluded from compilation, required functionality is not available but smaller builds are possible.
raylib modules have been slightly renamed to add some identity and note that they are independent modules that can be used as standalone separate parts of raylib if required.
The renamed modules are:
- `core` -> `rcore`
- `shapes` -> `rshapes`
- `textures` -> `rtextures`
- `text` -> `rtext`
- `models` -> `rmodels`
- `camera` -> `rcamera`
- `gestures` -> `rgestures`
- `core` -> `rcore`
All the build systems has been adapted to this change.
rlgl has been redesigned to avoid any dependency to `raylib` or `raymath`, all functions using some of those libs have been reviewed.
- REMOVED: `Texture2D`, `Shader` structs dependency
- REMOVED: `Vector3`, `Matrix` structs dependency
- REMOVED: raymath functions dependency, all required math is implemented in rlgl
- ADDED: `rlMatrix` custom rlgl type
- ADDED: `utils.c`: `rlMatrixFromMatrix()` and `rlMatrixToMatrix()` for a safe conversion between raylib<->rlgl matrix types
- ADDED: `rl` prefix to all `rlgl` structs
- Other small tweaks here and there