### Lyte2D config.lua example

Source: https://lyte2d.com/index.html

Example configuration file for Lyte2D. Place it next to app.lua to set window size, title, fullscreen, vsync, and default filter/blend modes before the app loads. Keep it next to the zip or exe when fusing.

```lua
return {
    window_width = 800,
    window_height = 500,
    window_title = "my game",
    fullscreen = false,
    window_vsync = true,
    default_filtermode = "nearest", --linear
    default_blendmode = "blend",
}
```

--------------------------------

### Lyte2D sprite animation example

Source: https://lyte2d.com/

Interactive example showing sprite animation using a sprite sheet. Uses dt for time-based movement, input to change sprite tick, and matrix scaling for responsive drawing.

```lua
-- lyte sample local total_time = 0 local SCALE = 3 -- image_1 local image_1 = lyte.load_image("assets/hero.png") local sprite_1_tick = 2 local sprite_1_numticks = 5 function lyte.tick(dt, width, height) -- UPDATE -- dt is the time (in seconds) from last tick to now -- keep track of total time total_time = total_time + dt -- control the sprite tick draw with space or left mouse button if lyte.is_key_pressed("space") or lyte.is_mouse_pressed("mb1") then sprite_1_tick = (sprite_1_tick + 1) % sprite_1_numticks end -- scaled down width/height local W = width/SCALE local H = height/SCALE -- x position will change based on time local x_pos = W/2-16/2 + math.sin(total_time)*W/3 -- y position middle of the screen (even when window is resized) local y_pos = H/2-16/2 -- DRAW lyte.cls(0.2, 0.1, 0.1, 1) lyte.push_matrix() lyte.scale(SCALE, SCALE) lyte.draw_image_rect(image_1, x_pos, y_pos, 16*(sprite_1_tick), 0, 16, 16) lyte.pop_matrix() -- background with a "pulsating" alpha lyte.set_color(1,1,1, math.abs(math.sin(total_time/2))) lyte.draw_text("SPACE or LMB: change sprite tick", 10, height-40) end
```

--------------------------------

### get_mastervolume

Source: https://lyte2d.com/

Gets the master volume.

```APIDOC
## get_mastervolume

### Description
Gets the master volume.

### Signature
`get_mastervolume(): number`

### Returns
- **number** - The master volume value.
```

--------------------------------

### Lyte2D ImageBatch sample

Source: https://lyte2d.com/index.html

Example of using lyte.ImageBatch to draw multiple sprites from a batch image. It loads an image, creates a batch, adds random rectangles from a 4-sprite sheet, and draws them each tick. Pressing Enter or mouse button 1 resets and regenerates the batch.

```lua
-- lyte.ImageBatch sample
local img = lyte.load_image("assets/batch.png")
local batch = lyte.new_imagebatch(img);
local N = 100
local function add_items()
    for i=1,N do
        local x = math.random(10, 600) -- location of the destination rectangle
        local y = math.random(10, 400)
        local sz = math.random(8,128) -- size of the destination rectangle
        local r = math.random(1,4) -- one of the 4 sprites will be added
        if r == 1 then
            -- dest_x, y, width, height, source_x, y, width, height
            batch:add_rect(x, y, sz, sz, 0, 0, 32, 32 )
        elseif r == 2 then
            batch:add_rect(x, y, sz, sz, 32, 0, 32, 32 )
        elseif r == 3 then
            batch:add_rect(x, y, sz, sz, 0, 32, 32, 32 )
        else
            batch:add_rect(x, y, sz, sz, 32, 32, 32, 32 )
        end
    end
end
add_items()
function lyte.tick()
    lyte.cls(0,0,0,1)
    if lyte.is_key_down("enter") or lyte.is_mouse_down("mb1") then
        batch:reset()
        add_items()
    end
    batch:draw()
end
```

--------------------------------

### get_textinput

Source: https://lyte2d.com/

Gets all keyboard text input from the last frame. Output is UTF-8 encoded.

```APIDOC
## get_textinput

### Description
Gets all keyboard text input from the last frame. Output is UTF-8 encoded.

### Signature
`get_textinput(): string`

### Returns
- **string** - The text input received during the last frame.
```

--------------------------------

### get_gamepad_count

Source: https://lyte2d.com/

Gets the number of connected gamepads.

```APIDOC
## get_gamepad_count

### Description
Gets the number of connected gamepads.

### Signature
`get_gamepad_count(): int`

### Returns
- **int** - The number of gamepads.
```

--------------------------------

### get_gamepad_name

Source: https://lyte2d.com/

Gets the name of the gamepad at the given index.

```APIDOC
## get_gamepad_name

### Description
Gets the name of the gamepad at the given index.

### Signature
`get_gamepad_name(index: int): string`

### Parameters
- **index** (int) - Required - The index of the gamepad.

### Returns
- **string** - The name of the gamepad.
```

--------------------------------

### get_mouse_x

Source: https://lyte2d.com/

Gets the current mouse x position.

```APIDOC
## get_mouse_x

### Description
Gets the current mouse x position.

### Signature
`get_mouse_x(): int`

### Returns
- **int** - The x coordinate of the mouse.
```

--------------------------------

### get_music_volume

Source: https://lyte2d.com/

Gets the volume of the given music object.

```APIDOC
## get_music_volume

### Description
Gets the volume of the given music object.

### Signature
`get_music_volume(music: lyte.Music): number`

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The volume value.
```

--------------------------------

### set_window_monitor(index)

Source: https://lyte2d.com/index.html

Sets the window's initial monitor to the indexed value. Must be set before the window is opened.

```APIDOC
## set_window_monitor(index: int)

### Description
Set the window's initial monitor to the indexed value. Must be set before the window is opened.

### Parameters
- **index** (int) - Required - The monitor index.

### Returns
None
```

--------------------------------

### set_window_size(width, height)

Source: https://lyte2d.com/index.html

Sets the window's size.

```APIDOC
## set_window_size(width: int, height: int)

### Description
Set the window's size.

### Parameters
- **width** (int) - Required - Window width.
- **height** (int) - Required - Window height.

### Returns
None
```

--------------------------------

### get_mouse_y

Source: https://lyte2d.com/

Gets the current mouse y position.

```APIDOC
## get_mouse_y

### Description
Gets the current mouse y position.

### Signature
`get_mouse_y(): int`

### Returns
- **int** - The y coordinate of the mouse.
```

--------------------------------

### Basic Lyte2D shader with screen_size uniform

Source: https://lyte2d.com/index.html

Creates a shader program with a screen_size uniform, a vertex shader that passes image UV coordinates, and a fragment shader that modifies color based on screen position and UV. The shader is applied to rectangles and rotated in the tick function.

```lua
-- lyte sample
local total_time = 0

-- creating a shader program. single argument is a dictionary
-- which defines the shader.
-- (as of alpha) currently all values need to be passed.
local shader_1 = lyte.new_shader({

    -- uniforms and their types must be defined beforehand. accepted types:
    -- float, vec2, vec3, vec4, mat4, int, ivec2, ivec3, ivec4 and sampler2D
    -- Note: do not declare these inside glsl code. they will be automatically
    -- added to the proper location.
    -- by default, two uniforms are passed and can be used in both shaders:
    -- uniform vec4 current_color --> the value set with lyte.set_color call
    -- uniform sampler2D current_image --> image set wit lyte.draw_image call
    uniforms = {
        screen_size = "vec2",
    },

    -- code for vertex shader. this will be default in a future release
    -- vert_main function must be defined. gl_Position must be set
    -- image_uv name is shared between vertex -> fragment shaders
    -- other can be added by the dev
    vert = [[
        // draw rect sends x, y positions and w/h, 4 floats
        in vec4 coords;
        out vec2 image_uv;
        void vert_main() {
            gl_Position = vec4(coords.xy, 0.0, 1.0);
            image_uv = coords.zw;
        }
    ]],

    -- code for fragment shader.
    -- frag_main function must be defined.
    -- must output a vec4 value representing rgba
    -- image_uv name is shared between vertex -> fragment shaders
    frag = [[
        in vec2 image_uv;
        out vec4 frag_color;
        void frag_main() {
            // default fragment shader looks something like the following
            //frag_color = texture(current_image, image_uv) * current_color;

            // we'll set blue to depend on the screen X of the pixel
            frag_color.b = gl_FragCoord.x / screen_size.x;
            // and red will depend on the texture X and Y of the pixel
            frag_color.r = image_uv.x * image_uv.y * 2.0;
            // and green to be the reverse of blue
            frag_color.g = (1.0 - frag_color.b);
            frag_color.a = 0.9;
        }
    ]]
})

local function draw_some_rects(x,y)
    -- draw some rectangles on different
    lyte.draw_rect(x+10, y, 60, 20)
    lyte.draw_rect(x+80, y, 60, 20)
    lyte.draw_rect(x+150, y, 60, 20)
    lyte.draw_rect(x+220, y, 60, 20)
end

function lyte.tick(dt, width, height)
    -- UPDATE
    total_time = total_time + dt

    -- shader_1:set({ screen_size = {width, height} })
    shader_1:set("screen_size", {width, height})
    -- lyte.set_shader_uniform(shader_1, "screen_size", {width, height})

    -- DRAW
    lyte.cls(0, 0, 0, 1)
    lyte.reset_color()
    lyte.set_shader(shader_1)
    lyte.draw_rect(10, 10, width-20, 40)
    draw_some_rects(10, 60)
    draw_some_rects(30, 90)
    draw_some_rects(60, 120)
    lyte.push_matrix()
    lyte.rotate_at(total_time/2, width/2, height/2)
    lyte.draw_rect(width/2-height/3, height/2-25, height*2/3, 50)
    lyte.pop_matrix()
    lyte.reset_shader()
end
```

--------------------------------

### Music Playback with Pitch and Pan Control

Source: https://lyte2d.com/index.html

Loads a music file and plays it immediately. Adjusts pitch with up/down keys or scroll, pan with left/right keys, and toggles play/pause with right mouse button. Displays playback info and control hints.

```lua
-- lyte sample
local total_time = 0
-- music
local music_1 = lyte.load_music("assets/elev.mp3")
-- start playing right away
music_1:play()

function lyte.tick(dt, width, height)
    -- UPDATE
    total_time = total_time + dt

    -- up/down keys to change the pitch
    if lyte.is_key_pressed("up") or lyte.is_mouse_pressed("scrollup") then
        music_1.pitch = (music_1.pitch + 0.01)
    elseif lyte.is_key_pressed("down") or lyte.is_mouse_pressed("scrolldown")then
        music_1.pitch = (music_1.pitch - 0.01)
    end

    -- left/right keys to change the pan
    if lyte.is_key_pressed("left") then
        music_1.pan = math.min(music_1.pan + 0.1, 1)
    elseif lyte.is_key_pressed("right") then
        music_1.pan = math.max(music_1.pan - 0.1, 0)
    end

    -- rmb start/pause music
    if lyte.is_mouse_pressed("mb2") then
        if music_1.playing then
            music_1:pause()
        else
            music_1:play()
        end
    end

    -- DRAW
    lyte.cls(0.0, 0.1, 0.2, 1)
    lyte.draw_text(("played: %1.2f/%3.1f secs"):format(music_1.length_played, music_1.length), 10, 10)
    lyte.draw_text(("pitch: %1.2f, pan: %1.2f "):format(music_1.pitch, music_1.pan), 10, 30)
    lyte.set_color(1,1,0.2,1)
    lyte.draw_text("(browser? LMB to enable sound)", 10, height/2-20)
    lyte.reset_color()
    lyte.draw_text("RMB to start/pause music", 10, height/2)
    -- background with a "pulsating" alpha
    lyte.set_color(0.8,0.9,0.8, math.abs(math.sin(total_time/2))+0.3)
    lyte.draw_text("Up/Down: change pitch", 10, height-40-20)
    lyte.set_color(0.9,0.8,0.8, math.abs(math.cos(total_time/2))+0.3)
    lyte.draw_text("Left/Right: change pan", 10, height-40)
end
```

--------------------------------

### set_window_minsize(width, height)

Source: https://lyte2d.com/index.html

Sets the window's minimum possible size.

```APIDOC
## set_window_minsize(width: int, height: int)

### Description
Set the window's minimum possible size.

### Parameters
- **width** (int) - Required - Minimum window width.
- **height** (int) - Required - Minimum window height.

### Returns
None
```

--------------------------------

### get_music_pitch

Source: https://lyte2d.com/

Gets the pitch of the given music object.

```APIDOC
## get_music_pitch

### Description
Gets the pitch of the given music object.

### Signature
`get_music_pitch(music: lyte.Music): number`

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The pitch value.
```

--------------------------------

### get_music_pan

Source: https://lyte2d.com/

Gets the pan of the given music object.

```APIDOC
## get_music_pan

### Description
Gets the pan of the given music object.

### Signature
`get_music_pan(music: lyte.Music): number`

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The pan value.
```

--------------------------------

### Lyte2D drawing primitives sample (s01_hello)

Source: https://lyte2d.com/index.html

Interactive sample demonstrating image loading, color management, and drawing primitives: rectangles, circles, lines, points, triangles, ellipses, and text. Uses push_matrix/scale/pop_matrix for transformations and draw_image_rect for sprite portions. Note the comment about version 0.7.4 adding new drawing primitives.

```lua
-- lyte sample -- load an image
local image_1 = lyte.load_image("assets/hero.png")

function lyte.tick(dt, width, height)
    -- background color
    lyte.cls(0, 0, 0, 1)

    -- foreground color for the rectangles, red with alpha
    lyte.set_color(1, 0, 0, 0.3)

    -- draw 4 filled overlapping rectangles
    for i=1,4 do
        local x = i * width/7
        local y = i * height/7
        lyte.draw_rect(x, y, width/3, height/3)
    end

    -- foreground color for the circles, green with alpha
    lyte.set_color(0, 1, 0, 0.3)

    -- draw 4 filled overlapping circles
    for i=1,4 do
        local x = width - ((i+1) * width/7)
        local y = i * height/7
        lyte.draw_circle(x, y, (width+height)/6)
    end

    lyte.set_color(1,1,0,1)
    lyte.draw_circle_line(width/2, height/2, (width+height)/4);

    lyte.reset_color() -- sets color to: (1, 1, 1, 1)

    -- draw the text on the top
    lyte.draw_text("Hello, Lyte2D", 4, 4)

    -- draw the image
    lyte.draw_image(image_1, 10, 50)

    -- draw the image, scaled
    lyte.push_matrix()
    lyte.scale(2, 2)

    -- full image
    lyte.draw_image(image_1, 10, 70)

    -- a portion of the image (sprite's ticks are 16x16. draw #3)
    lyte.draw_image_rect(image_1, 10, 90, 16*(3-1), 0, 16, 16)

    -- 0.7.4: new drawing primitives
    lyte.draw_line(10,10,100,100)
    lyte.draw_point(102,102)
    lyte.draw_triangle_line(150,50,154,100, 220,100)
    lyte.draw_triangle(150,150,154,200, 220,200)
    lyte.draw_ellipse(250, 50, 30, 10)
    lyte.draw_ellipse_line(220, 50, 30, 10)
    lyte.draw_ellipse(250, 150, 10, 40)
    lyte.draw_ellipse_line(220, 150, 6, 30)

    lyte.pop_matrix()
end
```

--------------------------------

### load_font(font_path, size)

Source: https://lyte2d.com/index.html

Loads a font from the specified path and sets the initial size.

```APIDOC
## load_font(font_path: string, size: number): lyte.Font

### Description
Load the font specified in the path, and set the initial size.

### Parameters
- **font_path** (string) - Required - Path to the font file.
- **size** (number) - Required - Initial font size.

### Returns
- **lyte.Font** - The loaded font object.
```

--------------------------------

### Hello world in Lyte2D

Source: https://lyte2d.com/index.html

Minimal Lyte2D program that draws the text 'Hello, world' at coordinates (0, 0) on each tick. The lyte.tick function is the main game loop callback.

```lua
function lyte.tick()
    lyte.draw_text("Hello, world", 0, 0)
end
```

--------------------------------

### new_shader

Source: https://lyte2d.com/index.html

Creates a shader with the given specification.

```APIDOC
## new_shader

### Description
Creates a shader with given specification.

### Function Signature
`new_shader(shaderdef: lyte.ShaderDef): lyte.Shader`

### Parameters
- **shaderdef** (lyte.ShaderDef) - Required - The shader definition.

### Returns
- **lyte.Shader** - The created shader.
```

--------------------------------

### get_pressed_keys

Source: https://lyte2d.com/

Gets the list of currently pressed keys.

```APIDOC
## get_pressed_keys

### Description
Gets the list of currently pressed keys.

### Signature
`get_pressed_keys(): lyte.KeyList`

### Returns
- **lyte.KeyList** - A list of pressed keys.
```

--------------------------------

### Window Functions

Source: https://lyte2d.com/index.html

Functions to manage the window, including vsync, icon, margins, and paddings.

```APIDOC
## is_window_vsync

### Description
Returns whether the window is in vsync mode.

### Method
function

### Signature
is_window_vsync(): boolean

### Returns
- **boolean** - True if vsync is enabled, false otherwise.

## set_window_icon_file

### Description
Sets the window icon from the specified file path.

### Method
function

### Signature
set_window_icon_file(icon_path: string)

### Parameters
- **icon_path** (string) - Required - Path to the icon file.

## set_window_margins

### Description
Sets the window margins. Margins are ignored and no drawing can be made there.

### Method
function

### Signature
set_window_margins(left: int, right: int, top: int, bottom: int)

### Parameters
- **left** (int) - Required - Left margin size.
- **right** (int) - Required - Right margin size.
- **top** (int) - Required - Top margin size.
- **bottom** (int) - Required - Bottom margin size.

## set_window_paddings

### Description
Sets the window paddings. Paddings can be drawn on.

### Method
function

### Signature
set_window_paddings(left: int, right: int, top: int, bottom: int)

### Parameters
- **left** (int) - Required - Left padding size.
- **right** (int) - Required - Right padding size.
- **top** (int) - Required - Top padding size.
- **bottom** (int) - Required - Bottom padding size.
```

--------------------------------

### get_music_length

Source: https://lyte2d.com/

Gets the length of the given music object in seconds.

```APIDOC
## get_music_length

### Description
Gets the length of the given music object in seconds.

### Signature
`get_music_length(music: lyte.Music): number`

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The length in seconds.
```

--------------------------------

### load_sound

Source: https://lyte2d.com/

Loads the sound file specified in the path.

```APIDOC
## load_sound

### Description
Loads the sound file specified in the path.

### Signature
`load_sound(sound_path: string): lyte.Sound`

### Parameters
- **sound_path** (string) - Required - Path to the sound file.

### Returns
- **lyte.Sound** - A sound object.
```

--------------------------------

### load_music

Source: https://lyte2d.com/

Loads the music file specified in the path.

```APIDOC
## load_music

### Description
Loads the music file specified in the path.

### Signature
`load_music(music_path: string): lyte.Music`

### Parameters
- **music_path** (string) - Required - Path to the music file.

### Returns
- **lyte.Music** - A music object.
```

--------------------------------

### get_gamepad_axis

Source: https://lyte2d.com/

Gets the value of the given axis of the gamepad at the given index.

```APIDOC
## get_gamepad_axis

### Description
Gets the value of the given axis of the gamepad at the given index.

### Signature
`get_gamepad_axis(index: int, gamepad_axis: lyte.GamepadAxis): number`

### Parameters
- **index** (int) - Required - The index of the gamepad.
- **gamepad_axis** (lyte.GamepadAxis) - Required - The axis to query.

### Returns
- **number** - The axis value.
```

--------------------------------

### set_fullscreen(fullscreen)

Source: https://lyte2d.com/index.html

Sets the window to fullscreen or windowed mode.

```APIDOC
## set_fullscreen(fullscreen: boolean)

### Description
Set the window to fullscreen, or windowed mode.

### Parameters
- **fullscreen** (boolean) - Required - True for fullscreen, false for windowed.

### Returns
None
```

--------------------------------

### get_music_length_played

Source: https://lyte2d.com/

Gets the already played length of the given music object in seconds.

```APIDOC
## get_music_length_played

### Description
Gets the already played length of the given music object in seconds.

### Signature
`get_music_length_played(music: lyte.Music): number`

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The played length in seconds.
```

--------------------------------

### resume_music

Source: https://lyte2d.com/

Resumes the given music object.

```APIDOC
## resume_music

### Description
Resumes the given music object.

### Signature
`resume_music(music: lyte.Music)`

### Parameters
- **music** (lyte.Music) - Required - The music object to resume.
```

--------------------------------

### Sound Effects with Multiple Instances and Panning

Source: https://lyte2d.com/index.html

Loads two sound effects and creates multiple playable instances with different pan positions. Triggers sounds via mouse buttons and keys 1/2/3. Notes that browser sounds may be delayed.

```lua
-- lyte sample
local sfx_hurt = lyte.load_sound("assets/sfx_hurt.wav")
local sfx_shoot = lyte.load_sound("assets/sfx_shoot.ogg")

-- sound fx: playable instances
-- 3 'hurt' instances
local sfx_hurt_1 = lyte.clone_sound(sfx_hurt)
local sfx_hurt_2 = lyte.clone_sound(sfx_hurt)
local sfx_hurt_3 = lyte.clone_sound(sfx_hurt)
-- 2 'shoot' instances
local sfx_shoot_1 = lyte.clone_sound(sfx_shoot)
local sfx_shoot_2 = lyte.clone_sound(sfx_shoot)

-- pans on both sides and middle
sfx_hurt_1.pan = 1.0
sfx_hurt_2.pan = 0.5
sfx_hurt_3.pan = 0.0
-- pans on both sides
sfx_shoot_1.pan = 1.0
sfx_shoot_2.pan = 0.0

function lyte.tick(dt, width, height)
    -- UPDATE
    -- lmb/rmb for shooting sounds
    if lyte.is_mouse_pressed("mb1") then
        sfx_shoot_1:play()
    end
    if lyte.is_mouse_pressed("mb2") then
        sfx_shoot_2:play()
    end

    -- keys 1/2/3 for hurting sounds
    if lyte.is_key_pressed("1") then
        sfx_hurt_1:play()
    end
    if lyte.is_key_pressed("2") then
        sfx_hurt_2:play()
    end
    if lyte.is_key_pressed("3") then
        sfx_hurt_3:play()
    end

    -- DRAW
    lyte.cls(0.0, 0.15, 0.05, 1)
    lyte.draw_text("Sounds FX", 10, 10)
    lyte.draw_text("LMB/RMB for 'shooting'", 10, 60)
    lyte.draw_text("1/2/3 for 'hurting'", 10, 80)
    lyte.set_color(1, 1, 0, 1)
    lyte.draw_text("(on browser, sounds can be delayed)", 5, 120)
end
```

--------------------------------

### Gamepad Input Functions

Source: https://lyte2d.com/index.html

Functions to query gamepad presence, buttons, and axes.

```APIDOC
## get_gamepad_count

### Description
Gets the number of connected gamepads.

### Method
function

### Signature
get_gamepad_count(): int

### Returns
- **int** - The number of gamepads.

## get_gamepad_name

### Description
Gets the name of the gamepad at the given index.

### Method
function

### Signature
get_gamepad_name(index: int): string

### Parameters
- **index** (int) - Required - The index of the gamepad.

### Returns
- **string** - The name of the gamepad.

## is_gamepad_down

### Description
Checks if the given button of the gamepad at the given index is currently down.

### Method
function

### Signature
is_gamepad_down(index: int, gamepad_button: lyte.GamepadButton): boolean

### Parameters
- **index** (int) - Required - The index of the gamepad.
- **gamepad_button** (lyte.GamepadButton) - Required - The button to check.

### Returns
- **boolean** - True if the button is down, false otherwise.

## is_gamepad_pressed

### Description
Checks if the given button of the gamepad at the given index was pressed in the current frame.

### Method
function

### Signature
is_gamepad_pressed(index: int, gamepad_button: lyte.GamepadButton): boolean

### Parameters
- **index** (int) - Required - The index of the gamepad.
- **gamepad_button** (lyte.GamepadButton) - Required - The button to check.

### Returns
- **boolean** - True if the button was pressed, false otherwise.

## is_gamepad_released

### Description
Checks if the given button of the gamepad at the given index was released in the current frame.

### Method
function

### Signature
is_gamepad_released(index: int, gamepad_button: lyte.GamepadButton): boolean

### Parameters
- **index** (int) - Required - The index of the gamepad.
- **gamepad_button** (lyte.GamepadButton) - Required - The button to check.

### Returns
- **boolean** - True if the button was released, false otherwise.

## get_gamepad_axis

### Description
Gets the value of the given axis of the gamepad at the given index.

### Method
function

### Signature
get_gamepad_axis(index: int, gamepad_axis: lyte.GamepadAxis): number

### Parameters
- **index** (int) - Required - The index of the gamepad.
- **gamepad_axis** (lyte.GamepadAxis) - Required - The axis to query.

### Returns
- **number** - The axis value.
```

--------------------------------

### Audio Functions

Source: https://lyte2d.com/index.html

Functions for master volume, music, and sound playback.

```APIDOC
## set_mastervolume

### Description
Sets the master volume.

### Method
function

### Signature
set_mastervolume(mastervolume: number)

### Parameters
- **mastervolume** (number) - Required - The master volume value.

## get_mastervolume

### Description
Gets the master volume.

### Method
function

### Signature
get_mastervolume(): number

### Returns
- **number** - The master volume value.

## load_music

### Description
Loads the music file specified by the path.

### Method
function

### Signature
load_music(music_path: string): lyte.Music

### Parameters
- **music_path** (string) - Required - Path to the music file.

### Returns
- **lyte.Music** - The loaded music object.

## play_music

### Description
Plays the given music object.

### Method
function

### Signature
play_music(music: lyte.Music)

### Parameters
- **music** (lyte.Music) - Required - The music object to play.

## pause_music

### Description
Pauses the given music object.

### Method
function

### Signature
pause_music(music: lyte.Music)

### Parameters
- **music** (lyte.Music) - Required - The music object to pause.

## resume_music

### Description
Resumes the given music object.

### Method
function

### Signature
resume_music(music: lyte.Music)

### Parameters
- **music** (lyte.Music) - Required - The music object to resume.

## stop_music

### Description
Stops the given music object.

### Method
function

### Signature
stop_music(music: lyte.Music)

### Parameters
- **music** (lyte.Music) - Required - The music object to stop.

## is_music_playing

### Description
Checks if the given music object is currently playing.

### Method
function

### Signature
is_music_playing(music: lyte.Music): boolean

### Parameters
- **music** (lyte.Music) - Required - The music object to check.

### Returns
- **boolean** - True if playing, false otherwise.

## get_music_length

### Description
Gets the length of the given music object in seconds.

### Method
function

### Signature
get_music_length(music: lyte.Music): number

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The length in seconds.

## get_music_length_played

### Description
Gets the already played length of the given music object in seconds.

### Method
function

### Signature
get_music_length_played(music: lyte.Music): number

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The played length in seconds.

## seek_music

### Description
Moves the music time played to the given value.

### Method
function

### Signature
seek_music(music: lyte.Music, secs: number)

### Parameters
- **music** (lyte.Music) - Required - The music object.
- **secs** (number) - Required - The target time in seconds.

## set_music_volume

### Description
Sets the volume of the given music object.

### Method
function

### Signature
set_music_volume(music: lyte.Music, volume: number)

### Parameters
- **music** (lyte.Music) - Required - The music object.
- **volume** (number) - Required - The volume value.

## set_music_pan

### Description
Sets the pan of the given music object.

### Method
function

### Signature
set_music_pan(music: lyte.Music, pan: number)

### Parameters
- **music** (lyte.Music) - Required - The music object.
- **pan** (number) - Required - The pan value.

## set_music_pitch

### Description
Sets the pitch of the given music object.

### Method
function

### Signature
set_music_pitch(music: lyte.Music, pitch: number)

### Parameters
- **music** (lyte.Music) - Required - The music object.
- **pitch** (number) - Required - The pitch value.

## get_music_volume

### Description
Gets the volume of the given music object.

### Method
function

### Signature
get_music_volume(music: lyte.Music): number

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The volume value.

## get_music_pan

### Description
Gets the pan of the given music object.

### Method
function

### Signature
get_music_pan(music: lyte.Music): number

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The pan value.

## get_music_pitch

### Description
Gets the pitch of the given music object.

### Method
function

### Signature
get_music_pitch(music: lyte.Music): number

### Parameters
- **music** (lyte.Music) - Required - The music object.

### Returns
- **number** - The pitch value.

## load_sound

### Description
Loads the sound file specified by the path.

### Method
function

### Signature
load_sound(sound_path: string): lyte.Sound

### Parameters
- **sound_path** (string) - Required - Path to the sound file.

### Returns
- **lyte.Sound** - The loaded sound object.

## clone_sound

### Description
Clones the given sound object.

### Method
function

### Signature
clone_sound(orig: lyte.Sound): lyte.Sound

### Parameters
- **orig** (lyte.Sound) - Required - The original sound object.

### Returns
- **lyte.Sound** - A clone of the sound object.

## play_sound

### Description
Plays the given sound object.

### Method
function

### Signature
play_sound(sound: lyte.Sound)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object to play.

## pause_sound

### Description
Pauses the given sound object.

### Method
function

### Signature
pause_sound(sound: lyte.Sound)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object to pause.

## resume_sound

### Description
Resumes the given sound object.

### Method
function

### Signature
resume_sound(sound: lyte.Sound)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object to resume.

## stop_sound

### Description
Stops the given sound object.

### Method
function

### Signature
stop_sound(sound: lyte.Sound)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object to stop.

## is_sound_playing

### Description
Checks if the given sound object is currently playing.

### Method
function

### Signature
is_sound_playing(sound: lyte.Sound): boolean

### Parameters
- **sound** (lyte.Sound) - Required - The sound object to check.

### Returns
- **boolean** - True if playing, false otherwise.

## set_sound_volume

### Description
Sets the volume of the given sound object.

### Method
function

### Signature
set_sound_volume(sound: lyte.Sound, volume: number)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object.
- **volume** (number) - Required - The volume value.

## set_sound_pan

### Description
Sets the pan of the given sound object.

### Method
function

### Signature
set_sound_pan(sound: lyte.Sound, pan: number)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object.
- **pan** (number) - Required - The pan value.

## set_sound_pitch

### Description
Sets the pitch of the given sound object.

### Method
function

### Signature
set_sound_pitch(sound: lyte.Sound, pitch: number)

### Parameters
- **sound** (lyte.Sound) - Required - The sound object.
- **pitch** (number) - Required - The pitch value.
```

--------------------------------

### is_fullscreen()

Source: https://lyte2d.com/index.html

Checks if the window is set to fullscreen.

```APIDOC
## is_fullscreen(): boolean

### Description
Check if the window is set to fullscreen.

### Parameters
None

### Returns
- **boolean** - True if fullscreen, false otherwise.
```

--------------------------------

### set_window_title(title)

Source: https://lyte2d.com/index.html

Sets the window's title.

```APIDOC
## set_window_title(title: string)

### Description
Set the window's title.

### Parameters
- **title** (string) - Required - The new window title.

### Returns
None
```

--------------------------------

### new_imagebatch(image)

Source: https://lyte2d.com/index.html

Creates a new image batch from the given image.

```APIDOC
## new_imagebatch(image: lyte.Image): lyte.ImageBatch

### Description
Create an image batch.

### Parameters
- **image** (lyte.Image) - Required - The source image for the batch.

### Returns
- **lyte.ImageBatch** - The created image batch.
```

--------------------------------

### draw_imagebatch(imagebatch)

Source: https://lyte2d.com/index.html

Draws the image batch.

```APIDOC
## draw_imagebatch(imagebatch: lyte.ImageBatch)

### Description
Draw the image batch.

### Parameters
- **imagebatch** (lyte.ImageBatch) - Required - The image batch to draw.

### Returns
None
```

--------------------------------

### load_image(image_path)

Source: https://lyte2d.com/index.html

Loads an image from the specified path and returns a lyte.Image object.

```APIDOC
## load_image(image_path: string): lyte.Image

### Description
Load the image specified in the path.

### Parameters
- **image_path** (string) - Required - Path to the image file.

### Returns
- **lyte.Image** - The loaded image object.
```

--------------------------------

### set_window_resizable(resizable)

Source: https://lyte2d.com/index.html

Sets the window resizable flag to the given value. Must be set before the window is opened.

```APIDOC
## set_window_resizable(resizable: boolean)

### Description
Set the window resizable flag to the given value. Must be set before the window is opened.

### Parameters
- **resizable** (boolean) - Required - Whether the window should be resizable.

### Returns
None
```

--------------------------------

### resume_sound

Source: https://lyte2d.com/

Resumes the given sound object.

```APIDOC
## resume_sound

### Description
Resumes the given sound object.

### Signature
`resume_sound(sound: lyte.Sound)`

### Parameters
- **sound** (lyte.Sound) - Required - The sound object to resume.
```

--------------------------------

### load_textfile

Source: https://lyte2d.com/index.html

Loads the content of a text file from the given path.

```APIDOC
## load_textfile

### Description
Loads the file in the path.

### Function Signature
`load_textfile(file_path: string): string`

### Parameters
- **file_path** (string) - Required - The path to the text file to load.

### Returns
- **string** - The content of the file.
```

--------------------------------

### Lyte2D sprite animation sample (s02_movement)

Source: https://lyte2d.com/index.html

Interactive sample showing sprite animation with time-based movement and input handling. Uses lyte.is_key_pressed and lyte.is_mouse_pressed to advance a sprite tick, and scales the drawing with push_matrix/scale/pop_matrix. The sprite tick is controlled by SPACE or left mouse button.

```lua
-- lyte sample
local total_time = 0
local SCALE = 3

-- image_1
local image_1 = lyte.load_image("assets/hero.png")
local sprite_1_tick = 2
local sprite_1_numticks = 5

function lyte.tick(dt, width, height)
    -- UPDATE
    -- dt is the time (in seconds) from last tick to now
    -- keep track of total time
    total_time = total_time + dt

    -- control the sprite tick draw with space or left mouse button
    if lyte.is_key_pressed("space") or lyte.is_mouse_pressed("mb1") then
        sprite_1_tick = (sprite_1_tick + 1) % sprite_1_numticks
    end

    -- scaled down width/height
    local W = width/SCALE
    local H = height/SCALE

    -- x position will change based on time
    local x_pos = W/2-16/2 + math.sin(total_time)*W/3

    -- y position middle of the screen (even when window is resized)
    local y_pos = H/2-16/2

    -- DRAW
    lyte.cls(0.2, 0.1, 0.1, 1)

    lyte.push_matrix()
    lyte.scale(SCALE, SCALE)
    lyte.draw_image_rect(image_1, x_pos, y_pos, 16*(sprite_1_tick), 0, 16, 16)
    lyte.pop_matrix()

    -- background with a "pulsating" alpha
    lyte.set_color(1,1,1, math.abs(math.sin(total_time/2)))
    lyte.draw_text("SPACE or LMB: change sprite tick", 10, height-40)
end
```

--------------------------------

### push_matrix

Source: https://lyte2d.com/index.html

Pushes the current transformation matrix onto the stack.

```APIDOC
## push_matrix

### Description
Pushes the transform matrix.

### Function Signature
`push_matrix()`

### Parameters
- None

### Returns
- None
```

--------------------------------

### set_window_icon_file

Source: https://lyte2d.com/

Sets the window icon from an image file.

```APIDOC
## set_window_icon_file

### Description
Sets the window icon from an image file.

### Signature
`set_window_icon_file(icon_path: string)`

### Parameters
- **icon_path** (string) - Required - Path to the icon image file.
```

--------------------------------

### scale_at

Source: https://lyte2d.com/index.html

Applies scaling at a specified location to the current transformation matrix.

```APIDOC
## scale_at

### Description
Applies scaling at the given location (changes transform matrix).

### Function Signature
`scale_at(scale_x: number, scale_y: number, x: number, y: number)`

### Parameters
- **scale_x** (number) - Required - The scaling factor along the x-axis.
- **scale_y** (number) - Required - The scaling factor along the y-axis.
- **x** (number) - Required - The x-coordinate of the scaling center.
- **y** (number) - Required - The y-coordinate of the scaling center.

### Returns
- None
```

--------------------------------

### get_window_height()

Source: https://lyte2d.com/index.html

Returns the height of the window.

```APIDOC
## get_window_height(): int

### Description
Get the height of the window.

### Parameters
None

### Returns
- **int** - The height of the window in pixels.
```