Merged in gosu_more_drawables

lib/cyberarm_engine/gosu_ext/draw_arc.rb

@@ -0,0 +1,98 @@
+module Gosu
+  # Draw an arc around the point x and y.
+  #
+  # Color accepts the following: *Gosu::Color*, *Array* (with 2 colors), or a *Hash* with keys: _from:_ and _to:_ both colors.
+  #
+  # With a *Gosu::Color* the arc will be painted with color
+  #
+  # With an *Array* the first *Gosu::Color* with be the innermost color and the last *Gosu::Color* with be the outermost color
+  #
+  # With a *Hash* the arc will smoothly transition from the start of the arc to the end
+  # @example
+  #   # Using a Hash
+  #   Gosu.draw_arc(100, 100, 50, 0.5, 128, 4, {from: Gosu::Color::BLUE, to: Gosu::Color::GREEN}, 0, :default)
+  #
+  #   # Using an Array
+  #   Gosu.draw_arc(100, 100, 50, 0.5, 128, 4, [Gosu::Color::BLUE, Gosu::Color::GREEN], 0, :default)
+  #
+  #   # Using a Gosu::Color
+  #   Gosu.draw_arc(100, 100, 50, 0.5, 128, 4, Gosu::Color::BLUE, 0, :default)
+  #
+  #
+  # @param x X position.
+  # @param y Y position.
+  # @param radius radius of arc, in pixels.
+  # @param percentage how complete the segment is, _0.0_ is 0% and _1.0_ is 100%.
+  # @param segments how many segments for arc, more will appear smoother, less will appear jagged.
+  # @param thickness how thick arc will be.
+  # @param color [Gosu::Color, Array<Gosu::Color, Gosu::Color>, Hash{from: start_color, to: end_color}] color or colors to draw the arc with.
+  # @param z Z position.
+  # @param mode blend mode.
+  #
+  # @note _thickness_ is subtracted from radius, meaning that the arc will grow towards the origin, not away from it.
+  #
+  # @return [void]
+  def self.draw_arc(x, y, radius, percentage = 1.0, segments = 128, thickness = 4, color = Gosu::Color::WHITE, z = 0, mode = :default)
+    segments = 360.0 / segments
+
+    return if percentage == 0.0
+
+    0.step((359 * percentage), percentage > 0 ? segments : -segments) do |angle|
+      angle2 = angle + segments
+
+      point_a_left_x = x + Gosu.offset_x(angle, radius - thickness)
+      point_a_left_y = y + Gosu.offset_y(angle, radius - thickness)
+
+      point_a_right_x = x + Gosu.offset_x(angle2, radius - thickness)
+      point_a_right_y = y + Gosu.offset_y(angle2, radius - thickness)
+
+      point_b_left_x = x + Gosu.offset_x(angle, radius)
+      point_b_left_y = y + Gosu.offset_y(angle, radius)
+
+      point_b_right_x = x + Gosu.offset_x(angle2, radius)
+      point_b_right_y = y + Gosu.offset_y(angle2, radius)
+
+      if color.is_a?(Array)
+        Gosu.draw_quad(
+          point_a_left_x, point_a_left_y, color.first,
+          point_b_left_x, point_b_left_y, color.last,
+          point_a_right_x, point_a_right_y, color.first,
+          point_b_right_x, point_b_right_y, color.last,
+          z, mode
+        )
+      elsif color.is_a?(Hash)
+        start_color = color[:from]
+        end_color = color[:to]
+
+        color_a = Gosu::Color.rgba(
+          (end_color.red - start_color.red) * (angle / 360.0) + start_color.red,
+          (end_color.green - start_color.green) * (angle / 360.0) + start_color.green,
+          (end_color.blue - start_color.blue) * (angle / 360.0) + start_color.blue,
+          (end_color.alpha - start_color.alpha) * (angle / 360.0) + start_color.alpha,
+        )
+        color_b = Gosu::Color.rgba(
+          (end_color.red - start_color.red) * (angle2 / 360.0) + start_color.red,
+          (end_color.green - start_color.green) * (angle2 / 360.0) + start_color.green,
+          (end_color.blue - start_color.blue) * (angle2 / 360.0) + start_color.blue,
+          (end_color.alpha - start_color.alpha) * (angle2 / 360.0) + start_color.alpha,
+        )
+
+        Gosu.draw_quad(
+          point_a_left_x, point_a_left_y, color_a,
+          point_b_left_x, point_b_left_y, color_a,
+          point_a_right_x, point_a_right_y, color_b,
+          point_b_right_x, point_b_right_y, color_b,
+          z, mode
+        )
+      else
+        Gosu.draw_quad(
+          point_a_left_x, point_a_left_y, color,
+          point_b_left_x, point_b_left_y, color,
+          point_a_right_x, point_a_right_y, color,
+          point_b_right_x, point_b_right_y, color,
+          z, mode
+        )
+      end
+    end
+  end
+end

lib/cyberarm_engine/gosu_ext/draw_circle.rb

@@ -0,0 +1,31 @@
+module Gosu
+  ##
+  # Draw a filled circled around point X and Y.
+  #
+  # @param x X position.
+  # @param y Y position.
+  # @param radius radius of circle, in pixels.
+  # @param step_size resolution of circle, more steps will apear smoother, less will appear jagged.
+  # @param color color to draw circle with.
+  # @param mode blend mode.
+  #
+  # @return [void]
+  def self.draw_circle(x, y, radius, step_size = 36, color = Gosu::Color::WHITE, z = 0, mode = :default)
+    step_size = (360.0 / step_size).floor
+
+    0.step(359, step_size) do |angle|
+      angle2 = angle + step_size
+
+      point_lx = x + Gosu.offset_x(angle, radius)
+      point_ly = y + Gosu.offset_y(angle, radius)
+      point_rx = x + Gosu.offset_x(angle2, radius)
+      point_ry = y + Gosu.offset_y(angle2, radius)
+
+      Gosu.draw_triangle(
+        point_lx, point_ly, color,
+	      point_rx, point_ry, color,
+	      x, y, color, z, mode
+      )
+    end
+  end
+end

lib/cyberarm_engine/gosu_ext/draw_path.rb

@@ -0,0 +1,17 @@
+module Gosu
+  PathNode = Struct.new(:x, :y)
+
+  def self.draw_path(nodes, color = Gosu::Color::WHITE, z = 0, mode = :default)
+    last_node = nodes.first
+
+    nodes[1..nodes.size - 1].each do |current_node|
+      Gosu.draw_line(
+        last_node.x, last_node.y, color,
+        current_node.x, current_node.y, color,
+        z, mode
+      )
+
+      last_node = current_node
+    end
+  end
+end