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Contents
# This example demonstrates how to rotate a number of meshes
# so that each points towards a common & user controlled focal point.
#
# Requires toxiclibs-0020 or newer
#
# (c) 2012 Karsten Schmidt / LGPL2 licensed
#
load_libraries :toxiclibscore, :toxiclibs_p5, :colorutils, :vecmath
module Toxi
include_package 'toxi.geom'
include_package 'toxi.geom.mesh'
include_package 'toxi.processing'
end
# container for mesh positions
attr_reader :gfx, :positions
def setup
size(640,480,P3D)
ArcBall.init(self)
@gfx = Toxi::ToxiclibsSupport.new(self)
# compute mesh positions on circle in XZ plane
@positions = (Toxi::Circle.new(200).toPolygon2D(8)).map{ |p| p.to3DXZ}
end
def draw
background(51)
lights
no_stroke
# create manual focal point in XY plane
focus = Toxi::Vec3D.new((mouse_x - width/2), (mouse_y - height/2), 0)
# create mesh prototype to draw at all generated positions
# the mesh is a simple box placed at the world origin
m = Toxi::AABB.new(25).to_mesh
# draw focus
gfx.box(Toxi::AABB.new(focus, 5))
# align the positive z-axis of mesh to point at focus
# mesh needs to be located at world origin for it to work correctly
# only once rotated, move it to actual position
positions.map {|p| gfx.mesh(m.copy.pointTowards(focus.sub(p), Toxi::Vec3D::Z_AXIS).translate(p))}
# draw connections from mesh centers to focal point
stroke(0,255,255)
positions.map {|p| gfx.line(p, focus)}
end
Version data entries
6 entries across 6 versions & 1 rubygems