From 96d631e7b5981c6d511bf12fd82015cf906bf09d Mon Sep 17 00:00:00 2001
From: Martin Prout <mamba2928@yahoo.co.uk>
Date: Fri, 3 Jul 2020 14:06:29 +0100
Subject: [PATCH] solid text sketch

---
 .../gem/geomerative/solid_text.rb             | 76 +++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 external_library/gem/geomerative/solid_text.rb

diff --git a/external_library/gem/geomerative/solid_text.rb b/external_library/gem/geomerative/solid_text.rb
new file mode 100644
index 0000000..8e10d96
--- /dev/null
+++ b/external_library/gem/geomerative/solid_text.rb
@@ -0,0 +1,76 @@
+# frozen_string_literal: true
+
+require 'propane'
+require 'geomerative'
+
+# SolidText sketch, rubyists hate explicit get and set methods, using
+# JRuby convention to replace them
+class SolidText < Propane::App
+  attr_reader :em
+
+  def settings
+    size(600, 400, P3D)
+    smooth
+  end
+
+  def setup
+    sketch_title 'Solid Text'
+    RG.init(self)
+    grp = RG.get_text('Depth!', data_path('FreeSans.ttf'), 50, CENTER)
+    RG.polygonizer = RCommand::UNIFORMLENGTH
+    RG.polygonizer_length = 1
+    @em = RExtrudedMesh.new(grp)
+  end
+
+  def draw
+    background(100)
+    lights
+    translate(width / 2, height / 2, 200)
+    rotate_y(millis / 2000.0)
+    fill(255, 100, 0)
+    no_stroke
+    em.draw
+  end
+end
+
+SolidText.new
+
+# Custom extrusion class, including Proxy to access App methods
+class RExtrudedMesh
+  include Propane::Proxy
+  attr_reader :mesh, :points_array, :depth
+
+  def initialize(grp, dpth = 10)
+    @depth = dpth
+    @mesh = grp.to_mesh
+    @points_array = grp.points_in_paths
+  end
+
+  def draw_face(strips, depth)
+    strips.each do |strip|
+      begin_shape(TRIANGLE_STRIP)
+      strip.vertices.each do |point|
+        vertex(point.x, point.y, depth / 2.0)
+      end
+      end_shape(CLOSE)
+    end
+ end
+
+  def draw_sides(points_array, depth)
+    points_array.each do |points|
+      begin_shape(QUAD_STRIP)
+      points.each do |point|
+        vertex(point.x, point.y, depth / 2.0)
+        vertex(point.x, point.y, -depth / 2.0)
+      end
+      end_shape(CLOSE)
+    end
+  end
+
+  def draw
+    strips = mesh.strips
+    draw_face(strips, depth)
+    draw_face(strips, depth * -1)
+    draw_sides(points_array, depth)
+  end
+end