Synced with 2.3.

5 files changed, 485 insertions, 0 deletions

diff --git a/samples/99_genre_3d/01_3d_cube/app/main.rb b/samples/99_genre_3d/01_3d_cube/app/main.rb
new file mode 100644
index 0000000..fc95291
--- /dev/null
+++ b/samples/99_genre_3d/01_3d_cube/app/main.rb
@@ -0,0 +1,50 @@
+STARTX             = 0.0
+STARTY             = 0.0
+ENDY               = 20.0
+ENDX               = 20.0
+SPINPOINT          = 10
+SPINDURATION       = 400
+POINTSIZE          = 8
+BOXDEPTH           = 40
+YAW                = 1
+DISTANCE           = 10
+
+def tick args
+  args.outputs.background_color = [0, 0, 0]
+  a = Math.sin(args.state.tick_count / SPINDURATION) * Math.tan(args.state.tick_count / SPINDURATION)
+  s = Math.sin(a)
+  c = Math.cos(a)
+  x = STARTX
+  y = STARTY
+  offset_x = (1280 - (ENDX - STARTX)) / 2
+  offset_y =  (360 - (ENDY - STARTY)) / 2
+
+  srand(1)
+  while y < ENDY do
+    while x < ENDX do
+      if (y == STARTY ||
+          y == (ENDY / 0.5) * 2 ||
+          y == (ENDY / 0.5) * 2 + 0.5 ||
+          y == ENDY - 0.5 ||
+          x == STARTX ||
+          x == ENDX - 0.5)
+        z = rand(BOXDEPTH)
+        z *= Math.sin(a / 2)
+        x -= SPINPOINT
+        u = (x * c) - (z * s)
+        v = (x * s) + (z * c)
+        k = DISTANCE.fdiv(100) + (v / 500 * YAW)
+        u = u / k
+        v = y / k
+        w = POINTSIZE / 10 / k
+        args.outputs.sprites << { x: offset_x + u - w, y: offset_y + v - w, w: w, h: w, path: 'sprites/square-blue.png'}
+        x += SPINPOINT
+      end
+      x += 0.5
+    end
+    y += 0.5
+    x = STARTX
+  end
+end
+
+$gtk.reset
diff --git a/samples/99_genre_3d/01_3d_cube/sprites/square-blue.png b/samples/99_genre_3d/01_3d_cube/sprites/square-blue.png
new file mode 100644
index 0000000..b840849
--- /dev/null
+++ b/samples/99_genre_3d/01_3d_cube/sprites/square-blue.png
diff --git a/samples/99_genre_3d/02_wireframe/app/main.rb b/samples/99_genre_3d/02_wireframe/app/main.rb
new file mode 100644
index 0000000..8407d47
--- /dev/null
+++ b/samples/99_genre_3d/02_wireframe/app/main.rb
@@ -0,0 +1,150 @@
+def tick args
+  args.state.model   ||= Object3D.new('data/shuttle.off')
+  args.state.mtx     ||= rotate3D(0, 0, 0)
+  args.state.inv_mtx ||= rotate3D(0, 0, 0)
+  delta_mtx          = rotate3D(args.inputs.up_down * 0.01, input_roll(args) * 0.01, args.inputs.left_right * 0.01)
+  args.outputs.lines << args.state.model.edges
+  args.state.model.fast_3x3_transform! args.state.inv_mtx
+  args.state.inv_mtx = mtx_mul(delta_mtx.transpose, args.state.inv_mtx)
+  args.state.mtx     = mtx_mul(args.state.mtx, delta_mtx)
+  args.state.model.fast_3x3_transform! args.state.mtx
+  args.outputs.background_color = [0, 0, 0]
+  args.outputs.debug << args.gtk.framerate_diagnostics_primitives
+end
+
+def input_roll args
+  roll = 0
+  roll += 1 if args.inputs.keyboard.e
+  roll -= 1 if args.inputs.keyboard.q
+  roll
+end
+
+def rotate3D(theta_x = 0.1, theta_y = 0.1, theta_z = 0.1)
+  c_x, s_x = Math.cos(theta_x), Math.sin(theta_x)
+  c_y, s_y = Math.cos(theta_y), Math.sin(theta_y)
+  c_z, s_z = Math.cos(theta_z), Math.sin(theta_z)
+  rot_x    = [[1, 0, 0], [0, c_x, -s_x], [0, s_x, c_x]]
+  rot_y    = [[c_y, 0, s_y], [0, 1, 0], [-s_y, 0, c_y]]
+  rot_z    = [[c_z, -s_z, 0], [s_z, c_z, 0], [0, 0, 1]]
+  mtx_mul(mtx_mul(rot_x, rot_y), rot_z)
+end
+
+def mtx_mul(a, b)
+  is = (0...a.length)
+  js = (0...b[0].length)
+  ks = (0...b.length)
+  is.map do |i|
+    js.map do |j|
+      ks.map do |k|
+        a[i][k] * b[k][j]
+      end.reduce(&:plus)
+    end
+  end
+end
+
+class Object3D
+  attr_reader :vert_count, :face_count, :edge_count, :verts, :faces, :edges
+
+  def initialize(path)
+    @vert_count = 0
+    @face_count = 0
+    @edge_count = 0
+    @verts      = []
+    @faces      = []
+    @edges      = []
+    _init_from_file path
+  end
+
+  def _init_from_file path
+    file_lines = $gtk.read_file(path).split("\n")
+                     .reject { |line| line.start_with?('#') || line.split(' ').length == 0 } # Strip out simple comments and blank lines
+                     .map { |line| line.split('#')[0] } # Strip out end of line comments
+                     .map { |line| line.split(' ') } # Tokenize by splitting on whitespace
+    raise "OFF file did not start with OFF." if file_lines.shift != ["OFF"] # OFF meshes are supposed to begin with "OFF" as the first line.
+    raise "<NVertices NFaces NEdges> line malformed" if file_lines[0].length != 3 # The second line needs to have 3 numbers. Raise an error if it doesn't.
+    @vert_count, @face_count, @edge_count = file_lines.shift&.map(&:to_i) # Update the counts
+    # Only the vertex and face counts need to be accurate. Raise an error if they are inaccurate.
+    raise "Incorrect number of vertices and/or faces (Parsed VFE header: #{@vert_count} #{@face_count} #{@edge_count})" if file_lines.length != @vert_count + @face_count
+    # Grab all the lines describing vertices.
+    vert_lines = file_lines[0, @vert_count]
+    # Grab all the lines describing faces.
+    face_lines = file_lines[@vert_count, @face_count]
+    # Create all the vertices
+    @verts = vert_lines.map_with_index { |line, id| Vertex.new(line, id) }
+    # Create all the faces
+    @faces = face_lines.map { |line| Face.new(line, @verts) }
+    # Create all the edges
+    @edges = @faces.flat_map(&:edges).uniq do |edge|
+      sorted = edge.sorted
+      [sorted.point_a, sorted.point_b]
+    end
+  end
+
+  def fast_3x3_transform! mtx
+    @verts.each { |vert| vert.fast_3x3_transform! mtx }
+  end
+end
+
+class Face
+
+  attr_reader :verts, :edges
+
+  def initialize(data, verts)
+    vert_count = data[0].to_i
+    vert_ids   = data[1, vert_count].map(&:to_i)
+    @verts     = vert_ids.map { |i| verts[i] }
+    @edges     = []
+    (0...vert_count).each { |i| @edges[i] = Edge.new(verts[vert_ids[i - 1]], verts[vert_ids[i]]) }
+    @edges.rotate! 1
+  end
+end
+
+class Edge
+  attr_reader :point_a, :point_b
+
+  def initialize(point_a, point_b)
+    @point_a = point_a
+    @point_b = point_b
+  end
+
+  def sorted
+    @point_a.id < @point_b.id ? self : Edge.new(@point_b, @point_a)
+  end
+
+  def draw_override ffi
+    ffi.draw_line(@point_a.render_x, @point_a.render_y, @point_b.render_x, @point_b.render_y, 255, 0, 0, 128)
+    ffi.draw_line(@point_a.render_x+1, @point_a.render_y, @point_b.render_x+1, @point_b.render_y, 255, 0, 0, 128)
+    ffi.draw_line(@point_a.render_x, @point_a.render_y+1, @point_b.render_x, @point_b.render_y+1, 255, 0, 0, 128)
+    ffi.draw_line(@point_a.render_x+1, @point_a.render_y+1, @point_b.render_x+1, @point_b.render_y+1, 255, 0, 0, 128)
+  end
+
+  def primitive_marker
+    :line
+  end
+end
+
+class Vertex
+  attr_accessor :x, :y, :z, :id
+
+  def initialize(data, id)
+    @x  = data[0].to_f
+    @y  = data[1].to_f
+    @z  = data[2].to_f
+    @id = id
+  end
+
+  def fast_3x3_transform! mtx
+    _x, _y, _z = @x, @y, @z
+    @x         = mtx[0][0] * _x + mtx[0][1] * _y + mtx[0][2] * _z
+    @y         = mtx[1][0] * _x + mtx[1][1] * _y + mtx[1][2] * _z
+    @z         = mtx[2][0] * _x + mtx[2][1] * _y + mtx[2][2] * _z
+  end
+
+  def render_x
+    @x * (10 / (5 - @y)) * 170 + 640
+  end
+
+  def render_y
+    @z * (10 / (5 - @y)) * 170 + 360
+  end
+end
\ No newline at end of file
diff --git a/samples/99_genre_3d/02_wireframe/data/shuttle.off b/samples/99_genre_3d/02_wireframe/data/shuttle.off
new file mode 100644
index 0000000..4d0803c
--- /dev/null
+++ b/samples/99_genre_3d/02_wireframe/data/shuttle.off
@@ -0,0 +1,284 @@
+OFF
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diff --git a/samples/99_genre_3d/02_wireframe/data/what-is-this.txt b/samples/99_genre_3d/02_wireframe/data/what-is-this.txt
new file mode 100644
index 0000000..2b14e34
--- /dev/null
+++ b/samples/99_genre_3d/02_wireframe/data/what-is-this.txt
@@ -0,0 +1 @@
+https://en.wikipedia.org/wiki/OFF_(file_format)
\ No newline at end of file