cyberarm/i-mic-fps
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Progress towards modern gl made

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Cyberarm
2019-12-05 17:23:02 -06:00
parent 93a9e2215c
commit 6aeee41a71
10 changed files with 97 additions and 62 deletions
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39
lib/game_objects/camera.rb
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@@ -4,11 +4,12 @@ class IMICFPS
attr_accessor :field_of_view, :mouse_sensitivity
attr_reader :entity, :position, :orientation, :mouse_captured
def initialize(position:, orientation: Vector.new(0, 0, 0), fov: 70.0, view_distance: 155.0)
def initialize(position:, orientation: Vector.new(0, 0, 0), fov: 70.0, min_view_distance: 0.1, max_view_distance: 155.0)
@position = position
@orientation = orientation
@field_of_view = fov
@view_distance = view_distance
@min_view_distance = min_view_distance
@max_view_distance = max_view_distance
@constant_pitch = 20.0
@entity = nil
@@ -69,7 +70,7 @@ class IMICFPS
glMatrixMode(GL_PROJECTION) # The projection matrix is responsible for adding perspective to our scene.
glLoadIdentity # Resets current modelview matrix
# Calculates aspect ratio of the window. Gets perspective view. 45 is degree viewing angle, (0.1, 100) are ranges how deep can we draw into the screen
gluPerspective(@field_of_view, window.width / window.height, 0.1, @view_distance)
gluPerspective(@field_of_view, window.width / window.height, 0.1, @max_view_distance)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
glRotatef(@orientation.z, 1, 0, 0)
glRotatef(@orientation.y, 0, 1, 0)
@@ -158,14 +159,38 @@ class IMICFPS
elsif InputMapper.is?(:increase_view_distance, id)
# @field_of_view += 1
# @field_of_view = @field_of_view.clamp(1, 100)
@view_distance += 1
@view_distance = @view_distance.clamp(1, 1000)
@max_view_distance += 1
@max_view_distance = @max_view_distance.clamp(1, 1000)
elsif InputMapper.is?(:decrease_view_distance, id)
# @field_of_view -= 1
# @field_of_view = @field_of_view.clamp(1, 100)
@view_distance -= 1
@view_distance = @view_distance.clamp(1, 1000)
@max_view_distance -= 1
@max_view_distance = @max_view_distance.clamp(1, 1000)
end
end
def aspect_ratio
window.width / window.height
end
def projection_matrix
fov = 1 / Math.tan(@field_of_view / 2) # field of view
zn = @max_view_distance - @min_view_distance # near plane
zf = @max_view_distance + @min_view_distance # far plane
z_num = -(2 * @max_view_distance * @min_view_distance) / zn # something
Transform.new(
[
fov / aspect_ratio, 0, 0, 0,
0, fov, 0, 0,
0, 0, -zf / zn, z_num,
0, 0, -1, 0
]
)
end
def view_matrix
Transform.identity# Transform.rotate_3d(@orientation) * Transform.translate_3d(@position)
end
end
end