Support for TileSet, TileSetFont and drawing text with TextSprites

Introduced classes

class TileSet

gamnit :: TileSet

Efficiently retrieve tiles in a big texture
class TileSetFont

gamnit :: TileSetFont

A monospace bitmap font where glyphs are stored in a tileset

All class definitions

class TileSet

gamnit $ TileSet

Efficiently retrieve tiles in a big texture
class TileSetFont

gamnit $ TileSetFont

A monospace bitmap font where glyphs are stored in a tileset
package_diagram gamnit::tileset tileset gamnit::font font gamnit::tileset->gamnit::font gamnit::flat_core flat_core gamnit::font->gamnit::flat_core ...gamnit::flat_core ... ...gamnit::flat_core->gamnit::flat_core gamnit::flat flat gamnit::flat->gamnit::tileset gamnit::more_materials more_materials gamnit::more_materials->gamnit::flat gamnit::virtual_gamepad virtual_gamepad gamnit::virtual_gamepad->gamnit::flat gamnit::more_materials... ... gamnit::more_materials...->gamnit::more_materials gamnit::virtual_gamepad... ... gamnit::virtual_gamepad...->gamnit::virtual_gamepad


module abstract_collection

core :: abstract_collection

Abstract collection classes and services.
module abstract_text

core :: abstract_text

Abstract class for manipulation of sequences of characters
module angles

geometry :: angles

Angle related service using Float to represent an angle in radians
module app

app :: app

app.nit is a framework to create cross-platform applications
module app_base

app :: app_base

Base of the app.nit framework, defines App
module array

core :: array

This module introduces the standard array structure.
module assets

app :: assets

Portable services to load resources from the assets folder
module aware

android :: aware

Android compatibility module
module bitset

core :: bitset

Services to handle BitSet
module boxes

geometry :: boxes

Provides interfaces and classes to represent basic geometry needs.
module bytes

core :: bytes

Services for byte streams and arrays
module c

c :: c

Structures and services for compatibility with the C language
module caching

serialization :: caching

Services for caching serialization engines
module cameras

gamnit :: cameras

Camera services producing Model-View-Projection matrices
module cameras_cache

gamnit :: cameras_cache

Cache the Matrix produced by Camera::mvp_matrix
module circular_array

core :: circular_array

Efficient data structure to access both end of the sequence.
module codec_base

core :: codec_base

Base for codecs to use with streams
module codecs

core :: codecs

Group module for all codec-related manipulations
module collection

core :: collection

This module define several collection classes.
module core

core :: core

Standard classes and methods used by default by Nit programs and libraries.
module display

gamnit :: display

Abstract display services
module dynamic_resolution

gamnit :: dynamic_resolution

Virtual screen with a resolution independent from the real screen
module engine_tools

serialization :: engine_tools

Advanced services for serialization engines
module environ

core :: environ

Access to the environment variables of the process
module error

core :: error

Standard error-management infrastructure.
module exec

core :: exec

Invocation and management of operating system sub-processes.
module file

core :: file

File manipulations (create, read, write, etc.)
module fixed_ints

core :: fixed_ints

Basic integers of fixed-precision
module fixed_ints_text

core :: fixed_ints_text

Text services to complement fixed_ints
module flat

core :: flat

All the array-based text representations
module flat_core

gamnit :: flat_core

Core services for the flat API for 2D games
module gamnit

gamnit :: gamnit

Game and multimedia framework for Nit
module gc

core :: gc

Access to the Nit internal garbage collection mechanism
module geometry

geometry :: geometry

Provides interfaces and classes to represent basic geometry needs.
module glesv2

glesv2 :: glesv2

OpenGL graphics rendering library for embedded systems, version 2.0
module hash_collection

core :: hash_collection

Introduce HashMap and HashSet.
module input

mnit :: input

Defines abstract classes for user and general inputs to the application.
module inspect

serialization :: inspect

Refine Serializable::inspect to show more useful information
module iso8859_1

core :: iso8859_1

Codec for ISO8859-1 I/O
module kernel

core :: kernel

Most basic classes and methods.
module list

core :: list

This module handle double linked lists
module math

core :: math

Mathematical operations
module matrix

matrix :: matrix

Services for matrices of Float values
module meta

meta :: meta

Simple user-defined meta-level to manipulate types of instances as object.
module more_collections

more_collections :: more_collections

Highly specific, but useful, collections-related classes.
module native

core :: native

Native structures for text and bytes
module numeric

core :: numeric

Advanced services for Numeric types
module performance_analysis

performance_analysis :: performance_analysis

Services to gather information on the performance of events by categories
module points_and_lines

geometry :: points_and_lines

Interfaces and classes to represent basic geometry needs.
module poset

poset :: poset

Pre order sets and partial order set (ie hierarchies)
module programs

gamnit :: programs

Services for graphical programs with shaders, attributes and uniforms
module projection

matrix :: projection

Services on Matrix to transform and project 3D coordinates
module protocol

core :: protocol

module queue

core :: queue

Queuing data structures and wrappers
module range

core :: range

Module for range of discrete objects.
module re

core :: re

Regular expression support for all services based on Pattern
module realtime

realtime :: realtime

Services to keep time of the wall clock time
module ropes

core :: ropes

Tree-based representation of a String.
module serialization

serialization :: serialization

General serialization services
module serialization_core

serialization :: serialization_core

Abstract services to serialize Nit objects to different formats
module sorter

core :: sorter

This module contains classes used to compare things and sorts arrays.
module stream

core :: stream

Input and output streams of characters
module text

core :: text

All the classes and methods related to the manipulation of text entities
module textures

gamnit :: textures

Load textures, create subtextures and manage their life-cycle
module time

core :: time

Management of time and dates
module union_find

core :: union_find

union–find algorithm using an efficient disjoint-set data structure
module utf8

core :: utf8

Codec for UTF-8 I/O


module font

gamnit :: font

Abstract font drawing services, implemented by bmfont and tileset


module flat

gamnit :: flat

Simple API for 2D games, built around Sprite and App::update


module a_star-m


module cardboard

gamnit :: cardboard

Update the orientation of world_camera at each frame using the head position given by android::cardboard
module depth

gamnit :: depth

Framework for 3D games in Nit
module more_materials

gamnit :: more_materials

Various material implementations
module more_models

gamnit :: more_models

Services to load models from the assets folder
module selection

gamnit :: selection

Select Actor from a screen coordinate
module stereoscopic_view

gamnit :: stereoscopic_view

Refine EulerCamera and App::frame_core_draw to get a stereoscopic view
module virtual_gamepad

gamnit :: virtual_gamepad

Virtual gamepad mapped to keyboard keys for quick and dirty mobile support
module vr

gamnit :: vr

VR support for gamnit depth, for Android only
# Support for `TileSet`, `TileSetFont` and drawing text with `TextSprites`
module tileset

import font

# Efficiently retrieve tiles in a big texture
class TileSet
	# Texture containing the tileset
	var texture: Texture

	# Width of a tile
	var width: Numeric

	# Height of a tile
	var height: Numeric

	# Number of columns of tiles in the texture
	var nb_cols: Int = (texture.width / width.to_f).to_i is lazy

	# Number of rows of tiles in the texture
	var nb_rows: Int = (texture.height / height.to_f).to_i is lazy

	# Cache of the subtextures of tiles
	var subtextures: Array[Texture] is lazy do
		var subtextures = new Array[Texture]
		for j in [0..nb_rows[ do
			for i in [0..nb_cols[ do
				subtextures.add texture.subtexture(
					i.to_f*width.to_f, j.to_f*height.to_f, width.to_f, height.to_f)
		return subtextures

	# Subtexture for the tile at `x, y`
	# Require: `x < nb_cols and y < nb_rows`
	fun [](x,y: Int): Texture
		assert x >= 0 and x < nb_cols and y >= 0 and y <= nb_rows else print "{x}x{y}<?{nb_cols}x{nb_rows}"
		var idx = x + y * nb_cols
		return subtextures[idx]

# A monospace bitmap font where glyphs are stored in a tileset
# This `Font` does not implement all settings of `TextSprites`.
class TileSetFont
	super TileSet
	super Font

	# Set the characters present in `texture`
	# Last all characters from left to right, then top to bottom.
	# Line skip `\n`, are ignored and space ' ' skips holes in the tileset.
	fun chars=(chars: Text)
	is autoinit do
		chars_cleaned = chars.replace("\n", "")

	# Character present in the texture, set by `chars=`
	private var chars_cleaned: Text is noautoinit

	# Additional space to insert horizontally between characters
	# A negative value may display overlapped tiles.
	var hspace: Numeric = 0.0 is writable

	# Additional space to insert vertically between characters
	# A negative value may display overlapped tiles.
	var vspace: Numeric = 0.0 is writable

	# The glyph/tile/texture associated to `char`
	# Returns null if `char` is not in `chars`.
	fun char(char: Char): nullable Texture
		var i = chars_cleaned.index_of(char)
		if i == -1 then return null
		return subtextures[i]

	# Distance between the beginning of a letter tile and the beginning of the next letter tile
	fun advance: Float do return width.to_f + hspace.to_f

	# Distance between the beginning and the end of the longest line of `text`
	fun text_width(text: Text): Numeric
		var lines = text.split('\n')
		if lines.is_empty then return 0

		var longest = 0
		for line in lines do longest = longest.max(line.length)

		return longest.mul(advance)

	# Distance between the top of the first line to the bottom of the last line in `text`
	fun text_height(text: Text): Numeric
		if text.is_empty then return 0

		var n_lines = text.chars.count('\n')
		return (n_lines+1).mul(height.add(vspace)).sub(vspace)

	redef fun write_into(text_sprites, text)
		# Build new sprites
		var dx = advance/2.0
		var dy = hspace.to_f/2.0
		for c in text do
			if c == '\n' then
				dy -= height.to_f + vspace.to_f
				dx = advance/2.0
			else if c == pld then
				dy -= (height.to_f + vspace.to_f) * partial_line_mod.to_f
			else if c == plu then
				dy += (height.to_f + vspace.to_f) * partial_line_mod.to_f
			else if c.is_whitespace then
				dx += advance

			var tex = char(c)
			if tex == null then
				# Try to fallback to '?'
				tex = char('?')
				if tex == null then continue

			text_sprites.sprites.add new Sprite(tex, text_sprites.anchor.offset(dx, dy, 0))
			dx += advance