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math: add more tests (#1001)

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Olle Lukowski 2023-09-15 19:57:44 +02:00 • committed by GitHub
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commit 445265c554
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src/math/mat.zig
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@ -116,7 +116,6 @@ pub fn Mat(
}
/// Constructs a 2D matrix which scales each dimension by the given vector.
// TODO: needs tests
pub inline fn scale(s: math.Vec2) Matrix {
return init(
&RowVec.init(s.x(), 0, 0),
@ -126,13 +125,11 @@ pub fn Mat(
}
/// Constructs a 2D matrix which scales each dimension by the given scalar.
// TODO: needs tests
pub inline fn scaleScalar(t: Vec.T) Matrix {
return scale(math.Vec2.splat(t));
}
/// Constructs a 2D matrix which translates coordinates by the given vector.
// TODO: needs tests
pub inline fn translate(t: math.Vec2) Matrix {
return init(
&RowVec.init(1, 0, t.x()),
@ -142,13 +139,11 @@ pub fn Mat(
}
/// Constructs a 2D matrix which translates coordinates by the given scalar.
// TODO: needs tests
pub inline fn translateScalar(t: Vec.T) Matrix {
return translate(math.Vec2.splat(t));
}
/// Returns the translation component of the matrix.
// TODO: needs tests
pub inline fn translation(t: Matrix) math.Vec2 {
return math.Vec2.init(t.v[2].x(), t.v[2].y());
}
@ -206,7 +201,6 @@ pub fn Mat(
}
/// Constructs a 3D matrix which scales each dimension by the given vector.
// TODO: needs tests
pub inline fn scale(s: math.Vec3) Matrix {
return init(
&RowVec.init(s.x(), 0, 0, 0),
@ -217,13 +211,11 @@ pub fn Mat(
}
/// Constructs a 3D matrix which scales each dimension by the given scalar.
// TODO: needs tests
pub inline fn scaleScalar(s: Vec.T) Matrix {
return scale(math.Vec3.splat(s));
}
/// Constructs a 3D matrix which translates coordinates by the given vector.
// TODO: needs tests
pub inline fn translate(t: math.Vec3) Matrix {
return init(
&RowVec.init(1, 0, 0, t.x()),
@ -234,13 +226,11 @@ pub fn Mat(
}
/// Constructs a 3D matrix which translates coordinates by the given scalar.
// TODO: needs tests
pub inline fn translateScalar(t: Vec.T) Matrix {
return translate(math.Vec3.splat(t));
}
/// Returns the translation component of the matrix.
// TODO: needs tests
pub inline fn translation(t: *const Matrix) math.Vec3 {
return math.Vec3.init(t.v[3].x(), t.v[3].y(), t.v[3].z());
}
@ -519,6 +509,92 @@ test "Mat4x4_transpose" {
)).eql(m.transpose());
}
test "Mat3x3_scale" {
const m = math.Mat3x3.scale(math.vec2(2, 3));
try testing.expect(math.Mat3x3, math.Mat3x3.init(
&math.vec3(2, 0, 0),
&math.vec3(0, 3, 0),
&math.vec3(0, 0, 1),
)).eql(m);
}
test "Mat3x3_scaleScalar" {
const m = math.Mat3x3.scaleScalar(2);
try testing.expect(math.Mat3x3, math.Mat3x3.init(
&math.vec3(2, 0, 0),
&math.vec3(0, 2, 0),
&math.vec3(0, 0, 1),
)).eql(m);
}
test "Mat4x4_scale" {
const m = math.Mat4x4.scale(math.vec3(2, 3, 4));
try testing.expect(math.Mat4x4, math.Mat4x4.init(
&math.vec4(2, 0, 0, 0),
&math.vec4(0, 3, 0, 0),
&math.vec4(0, 0, 4, 0),
&math.vec4(0, 0, 0, 1),
)).eql(m);
}
test "Mat4x4_scaleScalar" {
const m = math.Mat4x4.scaleScalar(2);
try testing.expect(math.Mat4x4, math.Mat4x4.init(
&math.vec4(2, 0, 0, 0),
&math.vec4(0, 2, 0, 0),
&math.vec4(0, 0, 2, 0),
&math.vec4(0, 0, 0, 1),
)).eql(m);
}
test "Mat3x3_translate" {
const m = math.Mat3x3.translate(math.vec2(2, 3));
try testing.expect(math.Mat3x3, math.Mat3x3.init(
&math.vec3(1, 0, 2),
&math.vec3(0, 1, 3),
&math.vec3(0, 0, 1),
)).eql(m);
}
test "Mat4x4_translate" {
const m = math.Mat4x4.translate(math.vec3(2, 3, 4));
try testing.expect(math.Mat4x4, math.Mat4x4.init(
&math.vec4(1, 0, 0, 2),
&math.vec4(0, 1, 0, 3),
&math.vec4(0, 0, 1, 4),
&math.vec4(0, 0, 0, 1),
)).eql(m);
}
test "Mat3x3_translateScalar" {
const m = math.Mat3x3.translateScalar(2);
try testing.expect(math.Mat3x3, math.Mat3x3.init(
&math.vec3(1, 0, 2),
&math.vec3(0, 1, 2),
&math.vec3(0, 0, 1),
)).eql(m);
}
test "Mat4x4_translateScalar" {
const m = math.Mat4x4.translateScalar(2);
try testing.expect(math.Mat4x4, math.Mat4x4.init(
&math.vec4(1, 0, 0, 2),
&math.vec4(0, 1, 0, 2),
&math.vec4(0, 0, 1, 2),
&math.vec4(0, 0, 0, 1),
)).eql(m);
}
test "Mat3x3_translation" {
const m = math.Mat3x3.translate(math.vec2(2, 3));
try testing.expect(math.Vec2, math.vec2(2, 3)).eql(m.translation());
}
test "Mat4x4_translation" {
const m = math.Mat4x4.translate(math.vec3(2, 3, 4));
try testing.expect(math.Vec3, math.vec3(2, 3, 4)).eql(m.translation());
}
// TODO(math): the tests below violate our styleguide (https://machengine.org/about/style/) we
// should write new tests loosely based on them: