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#
# Copyright (c) 2001 by Jim Menard <jimm@io.com>
#
# Released under the same license as Ruby. See
# http://www.ruby-lang.org/en/LICENSE.txt.
#
require 'View'
class BoidView < View
BODY_COLOR = [0, 0, 0]
BEAK_COLOR = [0.75, 0.5, 0.0]
SHADOW_COLOR = [0.25, 0.55, 0.25]
HALF_WING_BASE = 3
HALF_LENGTH = 5
HALF_THICKNESS = 1
NOSE_LENGTH = 3
@@object = nil
@@shadow = nil
@@wings = nil
@@wingsShadows = nil
def initialize(model)
super(model, [0, 0, 0])
@wings = nil
@wingsShadows = nil
end
def makeObject
@@object = BoidView.makeObject() unless @@object
@object = @@object
@wings = @@wings
end
def makeShadow
BoidView.makeShadow() unless @@shadow
@shadow = @@shadow
@wingsShadows = @@wingsShadows
end
def drawObject
super()
angle = 0
case model.wingFlapPos
when 0
angle = 60
when 1, 7
angle = 30
when 2, 6
angle = 0
when 3, 5
angle = -30
when 4
angle = -60
end
PushMatrix()
Rotate(angle, 0, 0, 1)
CallList(@wings[0])
Rotate(angle * -2, 0, 0, 1)
CallList(@wings[1])
PopMatrix()
end
def BoidView.makeObject
makeWings()
object = GenLists(1)
NewList(object, COMPILE)
makeBody()
makeNose()
EndList()
return object
end
def BoidView.makeShadow
@@shadow = GenLists(1)
NewList(@@shadow, COMPILE)
p0 = Point::ORIGIN.dup()
p1 = Point::ORIGIN.dup()
dims = Point.new(HALF_THICKNESS, HALF_THICKNESS, HALF_LENGTH)
p0.subtractPoint(dims)
p1.addPoint(dims)
groundLevel = -($PARAMS['world_height'] / 2) + 1
Color(SHADOW_COLOR)
Begin(TQUADS)
Vertex(p1.x, groundLevel, p0.z)
Vertex(p0.x, groundLevel, p0.z)
Vertex(p0.x, groundLevel, p1.z)
Vertex(p1.x, groundLevel, p1.z)
End()
# Begin(TRIANGLES)
# Vertex(p1.x, groundLevel, p1.z)
# Vertex(0, groundLevel, p0.z)
# Vertex(p0.x, groundLevel, p1.z)
# End()
EndList()
end
def BoidView.makeBody
p0 = Point::ORIGIN.dup()
p1 = Point::ORIGIN.dup()
dims = Point.new(HALF_THICKNESS, HALF_THICKNESS, HALF_LENGTH)
p0.subtractPoint(dims)
p1.addPoint(dims)
Color(BODY_COLOR)
Graphics.boxFromCorners(p0, p1)
end
def BoidView.makeWings
@@wings = []
len = -$PARAMS['boid_wing_length']
@@wings << makeOneWing(len)
@@wings << makeOneWing(-len)
end
def BoidView.makeOneWing(len)
wing = GenLists(1)
NewList(wing, COMPILE)
Color(BODY_COLOR)
Begin(TRIANGLES)
Vertex(0, 0, -HALF_WING_BASE)
Vertex(len, 0, 0)
Vertex(0, 0, HALF_WING_BASE)
End()
EndList()
return wing
end
def BoidView.makeNose()
Color(BEAK_COLOR)
Begin(TRIANGLE_FAN)
Vertex(0, 0, HALF_LENGTH + NOSE_LENGTH)
Vertex( HALF_THICKNESS, HALF_THICKNESS, HALF_LENGTH)
Vertex(-HALF_THICKNESS, HALF_THICKNESS, HALF_LENGTH)
Vertex(-HALF_THICKNESS, -HALF_THICKNESS, HALF_LENGTH)
Vertex( HALF_THICKNESS, -HALF_THICKNESS, HALF_LENGTH)
End()
end
end
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