Class: SpriteKit::Canvas

Inherits:
Object
  • Object
show all
Defined in:
mygame/lib/sprite_kit/canvas.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(state:, spritesheets:) ⇒ Canvas

Returns a new instance of Canvas.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 11

def initialize(state:, spritesheets:)
  @spritesheets = spritesheets

  # max_width of elements to load. Wraps downward if greater than 2000px
  @max_width = 2000

  @hover_rect = nil
  @hover_rect_screen = nil

  # @show_grid = false

  # used to calculate where clicks are registered.
  @viewport_boundary = {
    x: 0,
    y: 0,
    h: Grid.h,
    w: Grid.w
  }
  @state = state
end

Instance Attribute Details

#hover_rect ⇒ Object

Returns the value of attribute hover_rect.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 9

def hover_rect
  @hover_rect
end

#max_width ⇒ Object

Returns the value of attribute max_width.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 9

def max_width
  @max_width
end

#rect_size ⇒ Object

Returns the value of attribute rect_size.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 9

def rect_size
  @rect_size
end

#spritesheets ⇒ Object

Returns the value of attribute spritesheets.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 9

def spritesheets
  @spritesheets
end

#state ⇒ Object

Returns the value of attribute state.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 9

def state
  @state
end

#viewport_boundary ⇒ Object

Returns the value of attribute viewport_boundary.



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# File 'mygame/lib/sprite_kit/canvas.rb', line 9

def viewport_boundary
  @viewport_boundary
end

Instance Method Details

#calc(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 59

def calc(args)
  calc_camera(args)
end

#calc_camera(_args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 105

def calc_camera(_args)
  ease = 0.1
  @state.camera.scale += (@state.camera.target_scale - @state.camera.scale) * ease

  @state.camera.x += (@state.camera.target_x - @state.camera.x) * ease
  @state.camera.y += (@state.camera.target_y - @state.camera.y) * ease
end

#camera_render_target(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 32

def camera_render_target(args)
  rt = args.outputs[@state.camera_path]
  viewport = @state.camera.viewport
  args.outputs[@state.camera_path].w = viewport.w
  args.outputs[@state.camera_path].h = viewport.h
  rt
end

#camera_speed ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 40

def camera_speed
  3 + (12 / @state.camera.scale)
end

#input(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 50

def input(args)
  move_camera(args)

  if args.inputs.keyboard.key_down.escape
    @state.current_sprite = nil
  end

end

#move_camera(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 76

def move_camera(args)
  inputs = args.inputs

  speed = camera_speed

  # Movement
  if inputs.keyboard.left_arrow
    @state.camera.target_x -= speed
  elsif inputs.keyboard.right_arrow
    @state.camera.target_x += speed
  end

  if inputs.keyboard.down_arrow
    @state.camera.target_y -= speed
  elsif inputs.keyboard.up_arrow
    @state.camera.target_y += speed
  end

  # Zoom
  if args.inputs.keyboard.key_down.equal_sign || args.inputs.keyboard.key_down.plus
    @state.camera.target_scale += 0.25
  elsif args.inputs.keyboard.key_down.minus
    @state.camera.target_scale -= 0.25
    @state.camera.target_scale = 0.25 if @state.camera.target_scale < 0.25
  elsif args.inputs.keyboard.zero
    @state.camera.target_scale = 1
  end
end

#render(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 63

def render(args)
  render_camera(args)
  if @state.show_grid
    @state.draw_buffer[@state.camera_path].concat(render_grid)
  end
  render_sprite_canvas(args)
  render_current_sprite(args)

  if @hover_rect_screen
    @state.draw_buffer[@state.camera_path] << @hover_rect_screen
  end
end

#render_camera(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 113

def render_camera(args)
  camera_render_target(args)
  @state.draw_buffer.primitives << { **@state.camera.viewport, path: @state.camera_path }
end

#render_current_sprite(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 366

def render_current_sprite(args)
  current_sprite = @state.current_sprite
  if current_sprite
    current_sprite.w = current_sprite.source_w
    current_sprite.h = current_sprite.source_h
    current_sprite.x = @state.world_mouse.x - (@state.current_sprite.w / 2)
    current_sprite.y = @state.world_mouse.y - (@state.current_sprite.h / 2)
    # args.outputs.debug << { x: @state.camera.x, y: @state.camera.y }.to_s

    # prefab stuff.
    if @state.current_sprite.prefab && @state.current_sprite.prefab.length > 0
      prefab = SpriteMethods.render_prefab(@state.current_sprite).map do |sprite|
        @state.camera.to_screen_space(sprite)
      end
      @state.draw_buffer[@state.camera_path].sprites.concat(prefab)
    else
      @state.draw_buffer[@state.camera_path].sprites << @state.camera.to_screen_space(@state.current_sprite)
    end

    # @state.draw_buffer[@state.camera_path].sprites << @state.camera.to_screen_space(@state.current_sprite)
  end
end

#render_grid ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 389

def render_grid
  world = @state.camera.to_world_space!(@state.camera.viewport.dup)
  tile_size = 32

  min_x = (world.x / tile_size).floor * tile_size
  min_y = (world.y / tile_size).floor * tile_size
  max_x = world.x + world.w
  max_y = world.y + world.h

  solids = []

  x = min_x
  while x <= max_x
    s = { x: x, y: min_y, w: 1, h: max_y - min_y }
    @state.camera.to_screen_space!(s)
    solids << { x: s.x, y: s.y, w: 1, h: s.h, r: 255, g: 255, b: 255, a: 255, path: :solid }
    x += tile_size
  end

  y = min_y
  while y <= max_y
    s = { x: min_x, y: y, w: max_x - min_x, h: 1 }
    @state.camera.to_screen_space!(s)
    solids << { x: s.x, y: s.y, w: s.w, h: 1, r: 255, g: 255, b: 255, a: 255, path: :solid }
    y += tile_size
  end

  solids
end

#render_sprite_canvas(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 118

def render_sprite_canvas(args)
  x = 0
  y = 0
  gap = 80
  current_width = 0

  current_row = []

  @hover_rect = nil
  @hover_rect_screen = nil

  @spritesheets.each_with_index do |spritesheet, index|
    current_width += spritesheet.file_width

    if index > 0
      prev_spritesheet = @spritesheets[index - 1]
      if current_width + gap + spritesheet.file_width > @max_width
        # move down a row
        current_width = spritesheet.file_width
        y -= current_row.max_by(&:h).h + gap
        x = 0
        current_row = []
      else
        x += prev_spritesheet.file_width + gap
      end
    end

    spritesheet.merge!({
      x: x,
      y: y - spritesheet.file_height,
      w: spritesheet.file_width,
      h: spritesheet.file_height,
      path: spritesheet.path
    })

    current_row << spritesheet
  end

  visible_spritesheets = @state.camera.find_all_intersect_viewport(@spritesheets)

  visible_spritesheets.each do |spritesheet|
    spritesheet.spritesheet_screen = @state.camera.to_screen_space(spritesheet)

    @state.draw_buffer[@state.camera_path] << spritesheet.spritesheet_screen
    @state.draw_buffer[@state.camera_path].concat(Primitives.borders(spritesheet.spritesheet_screen).values)
  end

  Geometry.find_all_intersect_rect(@state.world_mouse, visible_spritesheets).each do |spritesheet|
    spritesheet_screen = spritesheet.spritesheet_screen
    rect_size = @state.tile_selection

    relative_x = (@state.world_mouse.x - spritesheet.x).clamp(@state.tile_selection.offset_x, spritesheet.w)
    relative_y = (@state.world_mouse.y - spritesheet.y).clamp(@state.tile_selection.offset_y, spritesheet.h)

    column_gap = @state.tile_selection.column_gap

    row_gap = @state.tile_selection.row_gap

    rect_x = (relative_x).ifloor(rect_size.w + column_gap)
    rect_y = (relative_y).ifloor(rect_size.h + row_gap)

    hover_rect_x = rect_x + spritesheet.x + @state.tile_selection.offset_x
    hover_rect_y = rect_y + spritesheet.y + @state.tile_selection.offset_y

    @hover_rect = rect_size.merge({
      x: hover_rect_x,
      y: hover_rect_y,
      path: :pixel,
      primitive_marker: :sprite,
      r: 255,
      g: 0,
      b: 0,
      a: 128
    })

    unclamped_source_x = (@hover_rect.x - spritesheet.x)# .clamp(0, spritesheet.w - rect_size.w)
    unclamped_source_y = (@hover_rect.y - spritesheet.y)# .clamp(0, spritesheet.h - rect_size.h)

    source_x = unclamped_source_x.clamp(@state.tile_selection.offset_x, spritesheet.w - rect_size.w)
    source_y = unclamped_source_y.clamp(@state.tile_selection.offset_y, spritesheet.h - rect_size.h)

    # source_w and source_h need to be "clamped" because otherwise you get weird scaling.
    source_w = (rect_size.w).clamp(@state.tile_selection.offset_x, spritesheet.w - source_x)
    if unclamped_source_x < 0
      source_w += unclamped_source_x
      @hover_rect.w += unclamped_source_x
      @hover_rect.x -= unclamped_source_x
    elsif unclamped_source_x > spritesheet.w - rect_size.w
      source_x_diff = unclamped_source_x - source_x
      source_w -= source_x_diff
      source_x += source_x_diff
      @hover_rect.w -= source_x_diff
      # @hover_rect.x -= source_x_diff
    end

    # w = 16, source_x = 72 = 88px, but file max is 80. need to chop 8px.
    # w = 16, source_x = 0 = 16px, file max is 80. use 16px.

    source_h = (rect_size.h).clamp(@state.tile_selection.offset_y, spritesheet.h - source_y)
    if unclamped_source_y < 0
      source_h += unclamped_source_y
      @hover_rect.h += unclamped_source_y
      @hover_rect.y -= unclamped_source_y
    elsif unclamped_source_y > spritesheet.h - rect_size.h
      source_y_diff = unclamped_source_y - source_y
      source_h -= source_y_diff
      source_y += source_y_diff
      @hover_rect.h -= source_y_diff
      # @hover_rect.x -= source_x_diff
    end
    # h = 16, source_y = 72 = 88px, but file max is 80px. need to chop 8px.
    # h = 16, source_x = 0 = 16px, file max is 80. use 16px.

    new_sprite = {
      spritesheet: spritesheet,
      w: @hover_rect.w,
      h: @hover_rect.h,
      source_x: source_x,
      source_y: source_y,
      source_w: source_w,
      source_h: source_h,
      path: spritesheet.path
    }

    if @state.current_sprite && @state.current_sprite.path == new_sprite.path && args.inputs.keyboard.key_down_or_held?(:shift)
      current_sprite = @state.current_sprite

      if current_sprite.source_x == new_sprite.source_x
        # no-op
      elsif current_sprite.source_x > new_sprite.source_x
        source_x = [current_sprite.source_x, new_sprite.source_x].min
        source_w = [current_sprite.source_x - new_sprite.source_x + @hover_rect.w, current_sprite.source_w].max
      else
        source_x = [current_sprite.source_x, new_sprite.source_x].min
        source_w = [new_sprite.source_x - current_sprite.source_x + @hover_rect.w, spritesheet.w - source_x].min
      end

      if current_sprite.source_y == new_sprite.source_y
        # no-op
      elsif current_sprite.source_y > new_sprite.source_y
        source_y = new_sprite.source_y
        source_h = current_sprite.source_y - new_sprite.source_y + [new_sprite.source_h, current_sprite.source_h].min
      else
        source_y = current_sprite.source_y
        source_h = new_sprite.source_y - current_sprite.source_y + [new_sprite.source_h, current_sprite.source_h].min
      end

      # rect_x = (relative_x).ifloor(rect_size.w + column_gap)
      # rect_y = (relative_y).ifloor(rect_size.h + row_gap)
      # puts "Rows: #{rows}, Columns: #{columns}"

      new_sprite = new_sprite.merge({
        source_x: source_x,
        source_y: source_y,
        source_w: source_w,
        source_h: source_h,
      })

      if args.inputs.mouse.click
        @virtual_sprite_selection = nil
      else
        @virtual_sprite_selection = {
          x: spritesheet.x + new_sprite.source_x,
          y: spritesheet.y + new_sprite.source_y,
          w: new_sprite.source_w,
          h: new_sprite.source_h,
          path: :pixel,
          r: 255,
          g: 255,
          b: 255,
          a: 64,
          # blendmode_enum: 0,
        }
      end
    else
      @virtual_sprite_selection = nil
    end

    if !args.inputs.mouse.intersect_rect?(@viewport_boundary)
      next
    end

    if args.inputs.mouse.click
      @state.current_sprite = new_sprite
      @state.current_sprite.spritesheet = spritesheet
    end

    @hover_rect_screen = @state.camera.to_screen_space(@hover_rect)

    label_size = 20
    label = {
      x: spritesheet_screen.x + (spritesheet_screen.w / 2),
      y: spritesheet_screen.y + spritesheet_screen.h + label_size,
      text: "#{spritesheet.path}",
      primitive_marker: :label,
      size_px: label_size,
      r: 255,
      b: 255,
      g: 255,
      a: 255,
      anchor_x: 0.5,
      anchor_y: 0.5,
      scale_quality_enum: 2
    }
    label_w, label_h = GTK.calcstringbox(label.text, size_px: label_size)
    label_background = label.merge({
      w: label_w + 16,
      h: label_h + 8,
      anchor_x: 0.5,
      anchor_y: 0.5,
      primitive_marker: :solid,
      r: 0,
      b: 0,
      g: 0,
      a: 255,
    })
    @state.draw_buffer[@state.camera_path].concat([
      label_background,
      label,
    ])
  end

  if @virtual_sprite_selection
    @state.draw_buffer[@state.camera_path] << @state.camera.to_screen_space(@virtual_sprite_selection)
  end


  if @state.current_sprite
    @current_sprite_selection = {
      x: @state.current_sprite.spritesheet.x + @state.current_sprite.source_x,
      y: @state.current_sprite.spritesheet.y + @state.current_sprite.source_y,
      w: @state.current_sprite.source_w,
      h: @state.current_sprite.source_h,
      path: :pixel,
      r: 50,
      g: 50,
      b: 50,
      a: 128,
    }

    s = @state.camera.to_screen_space(@current_sprite_selection)
    # make it appear to take the whole grid despite how borders appear.
    s.w += 1
    s.h += 1
    @state.draw_buffer[@state.camera_path] << s
  end
end

#sprite_out_of_bounds?(sprite, rect) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'mygame/lib/sprite_kit/canvas.rb', line 419

def sprite_out_of_bounds?(sprite, rect)
  return true if sprite.source_x < 0
  return true if sprite.source_y < 0
  return true if sprite.source_x + sprite.source_w > rect.w
  return true if sprite.source_y + sprite.source_h > rect.h

  false
end

#tick(args) ⇒ Object 



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# File 'mygame/lib/sprite_kit/canvas.rb', line 44

def tick(args)
  input(args)
  calc(args)
  render(args)
end