class CyberarmEngine::PerspectiveCamera

Attributes

aspect_ratio[RW]
field_of_view[RW]
max_view_distance[RW]
min_view_distance[RW]
orientation[RW]
position[RW]

Public Class Methods

new(position:, aspect_ratio:, orientation: Vector.new(0, 0, 0), field_of_view: 70.0, min_view_distance: 0.1, max_view_distance: 155.0) click to toggle source
# File lib/cyberarm_engine/opengl/perspective_camera.rb, line 6
def initialize(position:, aspect_ratio:, orientation: Vector.new(0, 0,
                                                                 0), field_of_view: 70.0, min_view_distance: 0.1, max_view_distance: 155.0)
  @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

Public Instance Methods

draw() click to toggle source
# File lib/cyberarm_engine/opengl/perspective_camera.rb, line 18
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
projection_matrix() click to toggle source
# File lib/cyberarm_engine/opengl/perspective_camera.rb, line 30
def projection_matrix
  Transform.perspective(@field_of_view, @aspect_ratio, @min_view_distance, @max_view_distance)
end
view_matrix() click to toggle source
# File lib/cyberarm_engine/opengl/perspective_camera.rb, line 34
def view_matrix
  Transform.translate_3d(@position * -1) * Transform.rotate_3d(@orientation)
end