Added Grid Units for asset placement.

This commit is contained in:
Khauvinkh 2024-08-17 13:34:29 +02:00
parent 5593d2a0da
commit 84d586de8a
7 changed files with 177 additions and 0 deletions

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using Unity.Mathematics;
using UnityEngine;
using static Unity.Mathematics.math;
using RigidTransform = Unity.Mathematics.RigidTransform;
using quaternion = Unity.Mathematics.quaternion;
public static class Grid
{
public static float CellSize = 0.25f;
public static float HalfCellSize => CellSize / 2;
public static int3 ToSnappedDirection(this float3 direction)
{
float3 absDirection = abs(direction);
int axisIndex = absDirection.x >= absDirection.y
? absDirection.x >= absDirection.z ? 0 : 2
: absDirection.y >= absDirection.z ? 1 : 2;
int3 snappedDirection = 0;
snappedDirection[axisIndex] = direction[axisIndex] > 0f ? 1 : -1;
return snappedDirection;
}
public static int3x3 ToSnappedOrientation(this quaternion rotation)
{
float3x3 orientation = float3x3(rotation);
int3 snappedRight = ToSnappedDirection(orientation.c0);
int3 upMask = (int3)(snappedRight == 0);
int3 snappedUp = ToSnappedDirection(orientation.c1 * upMask);
int3 forwardMask = upMask * (int3)(snappedUp == 0);
int3 snappedForward = ToSnappedDirection(orientation.c2 * forwardMask);
return int3x3(snappedRight, snappedUp, snappedForward);
}
public static float3 ToMeters(int3 size) => (float3)size * HalfCellSize;
private static RigidTransform GetParentSpace(Transform t)
{
Transform parent = t.parent;
GridUnit parentUnit = parent != null ? parent.GetComponentInParent<GridUnit>() : null;
if (parentUnit == null)
{
return RigidTransform.identity;
}
Transform parentTransform = parentUnit.transform;
RigidTransform parentSpace = RigidTransform(parentTransform.rotation, parentTransform.position);
float3 corner = parentUnit.CenterOffset - ToMeters(parentUnit.Size);
parentSpace.pos = transform(parentSpace, corner);
return parentSpace;
}
public static void SnapUnit(Transform t, int3 size, float3 centerOffset)
{
RigidTransform parentSpace = GetParentSpace(t);
RigidTransform rt = RigidTransform(t.rotation, t.position);
rt = mul(inverse(parentSpace), rt);
int3x3 snappedOrientation = rt.rot.ToSnappedOrientation();
rt.rot = quaternion.LookRotation(snappedOrientation.c2, snappedOrientation.c1);
float3 nudge = float3(1f);
if (size.x % 2 == 0)
nudge += snappedOrientation.c0;
if (size.y % 2 == 0)
nudge += snappedOrientation.c1;
if (size.z % 2 == 0)
nudge += snappedOrientation.c2;
nudge *= 0.5f;
float3 centerOffsetW = mul(rt.rot, centerOffset);
float3 centerW = rt.pos + centerOffsetW;
centerW = (round(centerW / CellSize - nudge) + nudge) * CellSize;
rt.pos = centerW - centerOffsetW;
rt = mul(parentSpace, rt);
t.SetPositionAndRotation(rt.pos, rt.rot);
}
}

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using UnityEngine;
using UnityEditor;
using Unity.Mathematics;
using static Unity.Mathematics.math;
using static Grid;
using Color = UnityEngine.Color;
#if UNITY_EDITOR
[ExecuteAlways]
[SelectionBase]
[DisallowMultipleComponent]
public class GridUnit : MonoBehaviour
{
public int3 Size = new (1, 1, 1);
private Vector3 SizeInMeters => new (Size.x * CellSize, Size.y * CellSize, Size.z * CellSize);
public float3 CenterOffset;
[SerializeField, HideInInspector]
private int3 cachedSize = new (1, 1, 1);
[SerializeField, HideInInspector]
private float3 cachedOffset;
private bool isDirty => transform.hasChanged ||
!all(cachedOffset != CenterOffset) ||
!all(cachedSize == Size);
public void Update()
{
if (!isDirty)
{
return;
}
SnapUnit(transform, Size, CenterOffset);
transform.hasChanged = false;
cachedOffset = CenterOffset;
cachedSize = Size;
}
[DrawGizmo(GizmoType.InSelectionHierarchy)]
private static void DrawGizmo(GridUnit unit, GizmoType type)
{
Transform t = unit.transform;
quaternion rotation = t.rotation;
var position = (float3)t.position + mul(rotation, unit.CenterOffset);
Gizmos.color = Color.white;
Gizmos.matrix = Matrix4x4.TRS(position, rotation, Vector3.one);
Gizmos.DrawWireCube(Vector3.zero, unit.SizeInMeters);
}
}
#endif

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"dependencies": { "dependencies": {
"com.unity.ide.rider": "3.0.31", "com.unity.ide.rider": "3.0.31",
"com.unity.ide.visualstudio": "2.0.22", "com.unity.ide.visualstudio": "2.0.22",
"com.unity.mathematics": "1.2.6",
"com.unity.textmeshpro": "3.0.6", "com.unity.textmeshpro": "3.0.6",
"com.unity.ugui": "1.0.0", "com.unity.ugui": "1.0.0",
"com.unity.modules.ai": "1.0.0", "com.unity.modules.ai": "1.0.0",

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}, },
"url": "https://packages.unity.com" "url": "https://packages.unity.com"
}, },
"com.unity.mathematics": {
"version": "1.2.6",
"depth": 0,
"source": "registry",
"dependencies": {},
"url": "https://packages.unity.com"
},
"com.unity.test-framework": { "com.unity.test-framework": {
"version": "1.1.33", "version": "1.1.33",
"depth": 1, "depth": 1,