3D example

Author: monkstone

external_library/java/handy/vertex_3d_test.rb

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+load_library :handy, :gicentreUtils
+
+java_import 'org.gicentre.handy.HandyPresets'
+java_import 'org.gicentre.handy.HandyRenderer'
+java_import 'org.gicentre.utils.FrameTimer'
+##****************************************************************************************
+# Simple sketch to test handy 3d shape building. 'H' toggles sketchiness on or off. 'A'
+#  changes hachure angle. Left and right arrow keys change vertex overshoot. Up and down
+#  arrows change degree of sketchiness.
+#  @author Jo Wood, giCentre, City University London.
+#  @version JRubyArt translation by Martin Prout, now uses ArcBall
+##****************************************************************************************
+
+# this file is part of Handy sketchy drawing library. Handy is free software: you can
+# redistribute it and/or modify it under the terms of the GNU Lesser General Public License
+# as published by the Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# Handy is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY
+# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along with self
+# source code (see COPYING.LESSER included with self source code). If not, see
+# http://www.gnu.org/licenses/.
+#
+
+# ----------------------------- Object variables ------------------------------
+attr_reader :h, :is_handy, :roughness, :timer, :overshoot, :angle
+attr_reader :xmag, :ymag, :newXmag, :newYmag, :diff
+# ---------------------------- Processing methods -----------------------------
+def settings
+  size(640, 360, P3D)
+  pixelDensity(displayDensity) # Use platform's maximum display density.
+end
+
+def setup
+  sketch_title 'Vertex 3D Test'
+  ArcBall.init(self)
+  @xmag = @ymag = @newXmag = @newYmag = 0
+  @timer = FrameTimer.new
+  @roughness = 1.5
+  @overshoot = 1.1
+  @angle = 45
+  @h = HandyPresets.createMarker(self)
+  @is_handy = true
+  h.setRoughness(roughness)
+  h.setHachureAngle(angle)
+  h.setHachurePerturbationAngle(0)
+  fill(180,80,80)
+end
+
+def draw
+  background(235, 215, 182)
+  timer.displayFrameRate
+  h.setSeed(1969)
+  h.setStrokeWeight(4)
+  h.setStrokeColour(color(0))
+  lengthA = 100
+  lengthB = 60
+  h.beginShape(QUADS)
+  h.vertex(-lengthA,  lengthA,  lengthB)
+  h.vertex( lengthA,  lengthA,  lengthB)
+  h.vertex( lengthA, -lengthA,  lengthB)
+  h.vertex(-lengthA, -lengthA,  lengthB)
+
+  h.vertex( lengthA,  lengthA,  lengthB)
+  h.vertex( lengthA,  lengthA, -lengthB)
+  h.vertex( lengthA, -lengthA, -lengthB)
+  h.vertex( lengthA, -lengthA,  lengthB)
+
+  h.vertex( lengthA,  lengthA, -lengthB)
+  h.vertex(-lengthA,  lengthA, -lengthB)
+  h.vertex(-lengthA, -lengthA, -lengthB)
+  h.vertex( lengthA, -lengthA, -lengthB)
+
+  h.vertex(-lengthA,  lengthA, -lengthB)
+  h.vertex(-lengthA,  lengthA,  lengthB)
+  h.vertex(-lengthA, -lengthA,  lengthB)
+  h.vertex(-lengthA, -lengthA, -lengthB)
+
+  h.vertex(-lengthA,  lengthA, -lengthB)
+  h.vertex( lengthA,  lengthA, -lengthB)
+  h.vertex( lengthA,  lengthA,  lengthB)
+  h.vertex(-lengthA,  lengthA,  lengthB)
+
+  h.vertex(-lengthA, -lengthA, -lengthB)
+  h.vertex( lengthA, -lengthA, -lengthB)
+  h.vertex( lengthA, -lengthA,  lengthB)
+  h.vertex(-lengthA, -lengthA,  lengthB)
+  h.endShape
+
+  # Pencil guide lines.
+  h.setStrokeWeight(2)
+  h.setStrokeColour(color(0,100))
+  h.line(-lengthA*overshoot,lengthA,lengthB, lengthA*overshoot,lengthA,lengthB)
+  h.line( lengthA,lengthA*overshoot, lengthB, lengthA, -lengthA*overshoot, lengthB)
+  h.line( lengthA*overshoot, -lengthA,  lengthB,-lengthA*overshoot, -lengthA,  lengthB)
+  h.line(-lengthA, -lengthA*overshoot,  lengthB,-lengthA,  lengthA*overshoot,  lengthB)
+
+  h.line( lengthA,  lengthA,  lengthB*overshoot, lengthA,  lengthA, -lengthB*overshoot)
+  h.line( lengthA,  lengthA*overshoot, -lengthB, lengthA, -lengthA*overshoot, -lengthB)
+  h.line( lengthA, -lengthA, -lengthB*overshoot, lengthA, -lengthA,  lengthB*overshoot)
+
+  h.line( lengthA*overshoot,  lengthA, -lengthB,-lengthA*overshoot,  lengthA, -lengthB)
+  h.line(-lengthA,  lengthA*overshoot, -lengthB,-lengthA, -lengthA*overshoot, -lengthB)
+  h.line(-lengthA*overshoot, -lengthA, -lengthB, lengthA*overshoot, -lengthA, -lengthB)
+
+  h.line(-lengthA,  lengthA, -lengthB*overshoot,-lengthA,  lengthA,  lengthB*overshoot)
+  h.line(-lengthA, -lengthA,  lengthB*overshoot,-lengthA, -lengthA, -lengthB*overshoot)
+end
+
+def key_pressed
+  case key
+  when 'h', 'H'
+    @is_handy = !is_handy
+    h.set_is_handy(is_handy)
+  when 'a', 'A'
+    @angle += 1
+    h.setHachureAngle(angle)
+  else
+    return unless key == CODED
+  end
+  case key_code
+  when UP
+    @roughness *= 1.1
+    h.setRoughness(roughness)
+  when DOWN
+    @roughness *= 0.9
+    h.setRoughness(roughness)
+  when LEFT
+    @overshoot *= 0.99 if overshoot > 1.0
+  when RIGHT
+    @overshoot *= 1.01
+  end
+end