16 lines
516 B
Zig
16 lines
516 B
Zig
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const constants = @import("./constants.zig");
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const vec3 = @import("./vec3.zig");
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const std = @import("std");
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pub fn gravity(mass: f64) vec3.Vec3F64 {
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return .init(0, 0, mass * constants.g);
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}
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test "gravity is correct" {
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const mass = 10;
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const fg = gravity(mass);
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try std.testing.expect(std.math.approxEqAbs(f64, fg.x(), 0, 1e-12));
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try std.testing.expect(std.math.approxEqAbs(f64, fg.y(), 0, 1e-12));
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try std.testing.expect(std.math.approxEqAbs(f64, fg.z(), constants.g * mass, 1e-12));
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}
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