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require 'ruby2d'
RSpec.describe Ruby2D::Quad do
describe "#new" do
it "creates a white quad by default" do
quad = Quad.new
expect(quad.color).to be_a(Ruby2D::Color)
expect(quad.color.r).to eq(1)
expect(quad.color.g).to eq(1)
expect(quad.color.b).to eq(1)
expect(quad.color.a).to eq(1)
end
it "creates a quad with options" do
quad = Quad.new(
x1: 10, y1: 20,
x2: 30, y2: 40,
x3: 50, y3: 60,
x4: 70, y4: 80,
z: 90,
color: 'gray', opacity: 0.5
)
expect(quad.x1).to eq(10)
expect(quad.y1).to eq(20)
expect(quad.x2).to eq(30)
expect(quad.y2).to eq(40)
expect(quad.x3).to eq(50)
expect(quad.y3).to eq(60)
expect(quad.x4).to eq(70)
expect(quad.y4).to eq(80)
expect(quad.z).to eq(90)
expect(quad.color.r).to eq(2/3.0)
expect(quad.opacity).to eq(0.5)
end
it "creates a new quad with one color via string" do
quad = Quad.new(color: 'red')
expect(quad.color).to be_a(Ruby2D::Color)
end
it "creates a new quad with one color via array of numbers" do
quad = Quad.new(color: [0.1, 0.3, 0.5, 0.7])
expect(quad.color).to be_a(Ruby2D::Color)
end
it "creates a new quad with 4 colors via array of 4 strings" do
quad = Quad.new(color: ['red', 'green', 'blue', 'black'])
expect(quad.color).to be_a(Ruby2D::Color::Set)
end
it "creates a new quad with 4 colors via array of 4 arrays of arrays of numbers" do
quad = Quad.new(
color: [
[0.1, 0.3, 0.5, 0.7],
[0.2, 0.4, 0.6, 0.8],
[0.3, 0.5, 0.7, 0.9],
[0.4, 0.6, 0.8, 1.0]
]
)
expect(quad.color).to be_a(Ruby2D::Color::Set)
end
it "throws an error when array of 3 strings is passed" do
expect do
Quad.new(color: ['red', 'green', 'blue'])
end.to raise_error("`Ruby2D::Quad` requires 4 colors, one for each vertex. 3 were given.")
end
it "throws an error when array of 5 strings is passed" do
expect do
Quad.new(color: ['red', 'green', 'blue', 'black', 'fuchsia'])
end.to raise_error("`Ruby2D::Quad` requires 4 colors, one for each vertex. 5 were given.")
end
end
describe "attributes" do
it "can be set and read" do
quad = Quad.new
quad.x1 = 10
quad.y1 = 20
quad.x2 = 30
quad.y2 = 40
quad.x3 = 50
quad.y3 = 60
quad.x4 = 70
quad.y4 = 80
quad.z = 90
quad.color = 'gray'
quad.opacity = 0.5
expect(quad.x1).to eq(10)
expect(quad.y1).to eq(20)
expect(quad.x2).to eq(30)
expect(quad.y2).to eq(40)
expect(quad.x3).to eq(50)
expect(quad.y3).to eq(60)
expect(quad.x4).to eq(70)
expect(quad.y4).to eq(80)
expect(quad.z).to eq(90)
expect(quad.color.r).to eq(2/3.0)
expect(quad.opacity).to eq(0.5)
end
end
# Quads define their own `contains?` method
describe "#contains?" do
quad = Quad.new(
x1: 1, y1: 1,
x2: 3, y2: 1,
x3: 3, y3: 3,
x4: 1, y4: 3
)
# Grid looks like this, 2x2 quad at point (1, 1):
#
# 0 1 2 3 4
# 0 +--+--+--+--+
# | | | | |
# 1 +--+--+--+--+
# | |XX|XX| |
# 2 +--+--+--+--+
# | |XX|XX| |
# 3 +--+--+--+--+
# | | | | |
# 4 +--+--+--+--+
it "returns true if point is inside the quad" do
expect(quad.contains?(1, 1)).to be true
expect(quad.contains?(2, 1)).to be true
expect(quad.contains?(3, 1)).to be true
expect(quad.contains?(1, 2)).to be true
expect(quad.contains?(2, 2)).to be true
expect(quad.contains?(3, 2)).to be true
expect(quad.contains?(1, 3)).to be true
expect(quad.contains?(2, 3)).to be true
expect(quad.contains?(3, 3)).to be true
end
it "returns false if point is outside the quad" do
# Clockwise around the quad
expect(quad.contains?(0, 0)).to be false
expect(quad.contains?(1, 0)).to be false
expect(quad.contains?(2, 0)).to be false
expect(quad.contains?(3, 0)).to be false
expect(quad.contains?(4, 0)).to be false
expect(quad.contains?(4, 1)).to be false
expect(quad.contains?(4, 2)).to be false
expect(quad.contains?(4, 3)).to be false
expect(quad.contains?(4, 4)).to be false
expect(quad.contains?(3, 4)).to be false
expect(quad.contains?(2, 4)).to be false
expect(quad.contains?(1, 4)).to be false
expect(quad.contains?(0, 4)).to be false
expect(quad.contains?(0, 3)).to be false
expect(quad.contains?(0, 2)).to be false
expect(quad.contains?(0, 1)).to be false
end
end
end
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