nsys-gl-utils 0.11.10

OpenGL and graphics utilities
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

//! Tile utilities.
//!
//! # Coordinates
//!
//! Tile space coordinates are defined as left-handed^* (row,column) coordinates with
//! the origin in the upper-left corner of the current viewport. Because the origin in
//! 2D world coordinates is relative to the current viewport, it will change depending
//! on the current viewport dimensions.
//!
//! ^*: "left-handed" in the sense of taking the left hand with palm facing down (away)
//! and taking the thumb to be the first coordinate and index finger to be the second
//! coordinate
//!
//! The tile space vertex shader stages take as input a tile (row,column) and output the
//! 2D world space coordinate for the upper-left corner of the tile. The tile geometry
//! shader will then produce the remaining vertices from this coordinate.

use crate::vertex;

/// Create tile vertices from a string of characters at a given (row,col) position
pub fn vertices (string : &str, (row, col) : (i32, i32)) -> Vec <vertex::Vert2dTile> {
  string.chars().enumerate().map (
    |(i, ch)| vertex::Vert2dTile { row, column: col + i as i32, tile: ch as u8 }
  ).collect()
}