Module: Chobo

Defined in:
lib/chobo.rb,
lib/chobo/vec2.rb,
lib/chobo/entity.rb,
lib/chobo/helpers.rb,
lib/chobo/version.rb,
lib/chobo/behavior.rb,
lib/chobo/commands.rb,
lib/chobo/animation.rb,
lib/chobo/game_object.rb

Defined Under Namespace

Classes: Animation, Behavior, Commands, Entity, GameObject, Vec2

Constant Summary collapse

VERSION = 
"0.0.2"

Class Method Summary collapse

Class Method Details

.clamp(value, min, max) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 76

def self.clamp(value, min, max)
	return min if value < min
	return max if value > max
	value
end

.color(r = 255, g = 255, b = 255, a = 255) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 22

def self.color(r = 255, g = 255, b = 255, a = 255)
	clr = Gosu::Color.new
	clr.red = r
	clr.green = g
	clr.blue = b
	clr.alpha = a
	clr		
end

.hermite(v1, t1, v2, t2, weight) ⇒ Object

value1, tangent1, value2, tangent2



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# File 'lib/chobo/helpers.rb', line 62

def self.hermite(v1, t1, v2, t2, weight)
	sCubed = weight * weight * weight
	sSquared = weight * weight
	result = 0.0
	if weight == 0.0
		result = v1
	elsif weight == 1.0
		result = v2
	else
		result = (2 * v1 - 2 * v2 + t2 + t1) * sCubed + (3 * v2 - 3 * v1 - 2 * t1 - t2) * sSquared + t1 * weight + v1
	end
    result
end

.lerp(x, y, w) ⇒ Object

linear interpolation



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# File 'lib/chobo/helpers.rb', line 52

def self.lerp x, y, w
	x + (y - x) * w		
end

.lerp_angle(from, to, frac) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 41

def self.lerp_angle from, to, frac
    if to - from > 180.to_radians
        to -= 360.to_radians
    end
    if to - from < -180.to_radians
        to += 360.to_radians
    end
	from + frac * (to - from)
end

.load_image(window, name) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 5

def self.load_image(window, name)
	return @images[name] if @images[name]
	return @images[name] = Gosu::Image.new(window, "#{CONTENT_ROOT}/gfx/#{name}.png")
end

.load_sample(window, name) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 14

def self.load_sample(window, name)
	Gosu::Sample.new(window, "#{CONTENT_ROOT}/audio/#{name}.wav")
end

.load_song(window, name) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 18

def self.load_song(window, name)
	Gosu::Song.new(window, "#{CONTENT_ROOT}/audio/#{name}.wav")
end

.load_tiles(window, name, tile_width, tile_height) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 10

def self.load_tiles(window, name, tile_width, tile_height)
	Gosu::Image.load_tiles(window, "#{CONTENT_ROOT}/gfx/#{name}.png", tile_width, tile_height, true)
end

.qlerp(min, max, weight) ⇒ Object

cubic interpolation using a hermite spline, aka smooth step



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# File 'lib/chobo/helpers.rb', line 57

def self.qlerp(min, max, weight)
	hermite(min, 0.0, max, 0.0, weight)
end

.wrap_angle(angle) ⇒ Object 



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# File 'lib/chobo/helpers.rb', line 31

def self.wrap_angle(angle)
	while angle > 360.to_radians
		angle -= 360.to_radians
	end
	while angle < 0.0
		angle += 360.to_radians
	end
	angle
end