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module CyberarmEngine
class PerspectiveCamera
attr_accessor :position, :orientation, :aspect_ratio, :field_of_view,
:min_view_distance, :max_view_distance
def initialize(position:, aspect_ratio:, orientation: Vector.new(0, 0, 0),
field_of_view: 70.0, min_view_distance: 0.1, max_view_distance: 1024.0)
@position = position
@orientation = orientation
@aspect_ratio = aspect_ratio
@field_of_view = field_of_view
@min_view_distance = min_view_distance
@max_view_distance = max_view_distance
end
def draw
glMatrixMode(GL_PROJECTION)
glLoadIdentity
gluPerspective(@field_of_view, @aspect_ratio, @min_view_distance, @max_view_distance)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
glRotatef(@orientation.x, 1, 0, 0)
glRotatef(@orientation.y, 0, 1, 0)
glTranslatef(-@position.x, -@position.y, -@position.z)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity
end
def projection_matrix
Transform.perspective(@field_of_view, @aspect_ratio, @min_view_distance, @max_view_distance)
end
def view_matrix
Transform.translate_3d(@position * -1) * Transform.rotate_3d(@orientation)
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems