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Add polygon clipping and area calculation to water contact patch collection

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This commit is contained in:
Victor Giers
2026-04-07 05:11:31 +02:00
parent 340ea8c3d3
commit b062b2beea
3 changed files with 456 additions and 100 deletions
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90
tests/domain/water-material.test.ts
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@@ -130,6 +130,96 @@ describe("water material helpers", () => {
expect(Math.abs(patches[0]?.axisZ ?? 0)).toBeGreaterThan(0.65);
});
it("clips rotated contact regions to the water footprint", () => {
const centeredPatch = collectWaterContactPatches(
{
center: {
x: 0,
y: 0,
z: 0
},
rotationDegrees: {
x: 0,
y: 0,
z: 0
},
size: {
x: 4,
y: 2,
z: 4
}
},
[
{
kind: "orientedBox",
center: {
x: 0,
y: 1,
z: 0
},
rotationDegrees: {
x: 0,
y: 45,
z: 0
},
size: {
x: 3,
y: 0.4,
z: 1
}
}
]
)[0];
const clippedPatch = collectWaterContactPatches(
{
center: {
x: 0,
y: 0,
z: 0
},
rotationDegrees: {
x: 0,
y: 0,
z: 0
},
size: {
x: 4,
y: 2,
z: 4
}
},
[
{
kind: "orientedBox",
center: {
x: 2.2,
y: 1,
z: 0
},
rotationDegrees: {
x: 0,
y: 45,
z: 0
},
size: {
x: 3,
y: 0.4,
z: 1
}
}
]
)[0];
expect(centeredPatch).toBeDefined();
expect(clippedPatch).toBeDefined();
expect(clippedPatch?.x ?? 999).toBeLessThan(2);
expect((clippedPatch?.halfWidth ?? 0) * (clippedPatch?.halfDepth ?? 0)).toBeLessThan(
(centeredPatch?.halfWidth ?? 0) * (centeredPatch?.halfDepth ?? 0)
);
expect(Math.abs(clippedPatch?.axisX ?? 0)).toBeGreaterThan(0.65);
expect(Math.abs(clippedPatch?.axisZ ?? 0)).toBeGreaterThan(0.65);
});
it("builds a shared quality shader material for visible tinted water", () => {
const result = createWaterMaterial({
colorHex: "#4da6d9",