46 lines
958 B
Ruby
Executable File
46 lines
958 B
Ruby
Executable File
#!/usr/bin/env ruby
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def prompt(message)
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$stdout.write(message)
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$stdout.flush
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$stdin.readline.chomp
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end
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if ARGV.size == 6
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args = ARGV
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else
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args = []
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args = prompt("Throw 1 X: ")
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args = prompt("Throw 1 Z: ")
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args = prompt("Throw 1 Angle: ")
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args = prompt("Throw 2 X: ")
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args = prompt("Throw 2 Z: ")
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args = prompt("Throw 2 Angle: ")
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end
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x_1, z_1, a_1, x_2, z_2, a_2 = *(args.map {|a| a.to_f})
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a_1 = Math::PI * a_1 / 180.0
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a_2 = Math::PI * a_2 / 180.0
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# Angle 0 is +Z, so Z = cos(a)
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# Angle 90 is -X, so X = -sin(a)
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# x = mz + b
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m_1 = -Math.sin(a_1) / Math.cos(a_1)
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m_2 = -Math.sin(a_2) / Math.cos(a_2)
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b_1 = x_1 - m_1 * z_1
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b_2 = x_2 - m_2 * z_2
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# x = (m1)z + (b1)
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# x = (m2)z + (b2)
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# (m1)z + (b1) = (m2)z + (b2)
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# (m1 - m2)z = b2 - b1
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# z = (b2 - b1) / (m1 - m2)
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z = (b_2 - b_1) / (m_1 - m_2)
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x = m_1 * z + b_1
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puts("Approx location: #{x.round(1)}, #{z.round(1)}")
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d = Math.sqrt(x * x + z * z)
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puts("Distance from origin: #{d}")
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