static PhysicsCollider CreateTerrainCollider(TerrainData terrainData, CollisionFilter filter)
{
var physicsCollider = new PhysicsCollider();
try
{
var size = new int2(terrainData.heightmapResolution, terrainData.heightmapResolution);
var scale = terrainData.heightmapScale;
var colliderHeights = new NativeArray <float>(terrainData.heightmapResolution * terrainData.heightmapResolution,
Allocator.TempJob);
var terrainHeights = terrainData.GetHeights(0, 0, terrainData.heightmapResolution, terrainData.heightmapResolution);
for (int j = 0; j < size.y; j++)
{
for (int i = 0; i < size.x; i++)
{
var h = terrainHeights[i, j];
colliderHeights[j + i * size.x] = h;
}
}
physicsCollider.Value = TerrainCollider.Create(colliderHeights, size, scale,
TerrainCollider.CollisionMethod.Triangles, filter);
colliderHeights.Dispose();
}
catch (Exception e) { }
return(physicsCollider);
}
public override void CreateScene(TerrainDemoScene sceneSettings)
{
// Make heightfield data
NativeArray <float> heights;
int2 size;
float3 scale;
bool simple = false;
#if UNITY_ANDROID || UNITY_IOS
simple = true;
#endif
bool flat = false;
bool mountain = false;
if (simple)
{
size = new int2(2, 2);
scale = new float3(25, 0.1f, 25);
heights = new NativeArray <float>(size.x * size.y * UnsafeUtility.SizeOf <float>(), Allocator.Temp);
heights[0] = 1;
heights[1] = 0;
heights[2] = 0;
heights[3] = 1;
}
else
{
size = new int2(sceneSettings.SizeX, sceneSettings.SizeZ);
scale = new float3(sceneSettings.ScaleX, sceneSettings.ScaleY, sceneSettings.ScaleZ);
float period = 50.0f;
heights = new NativeArray <float>(size.x * size.y * UnsafeUtility.SizeOf <float>(), Allocator.Temp);
for (int j = 0; j < size.y; j++)
{
for (int i = 0; i < size.x; i++)
{
float a = (i + j) * 2.0f * (float)math.PI / period;
heights[i + j * size.x] = flat ? 0.0f : math.sin(a);
if (mountain)
{
float fractionFromCenter = 1.0f - math.min(math.length(new float2(i - size.x / 2, j - size.y / 2)) / (math.min(size.x, size.y) / 2), 1.0f);
float mountainHeight = math.smoothstep(0.0f, 1, fractionFromCenter) * 25.0f;
heights[i + j * size.x] += mountainHeight;
}
}
}
}
// static terrain
Entity staticEntity;
{
var collider = sceneSettings.BuildTerrainMesh
? CreateMeshTerrain(heights, new int2(sceneSettings.SizeX, sceneSettings.SizeZ), new float3(sceneSettings.ScaleX, sceneSettings.ScaleY, sceneSettings.ScaleZ))
: TerrainCollider.Create(heights, size, scale, sceneSettings.Method);
CreatedColliders.Add(collider);
if (sceneSettings.BuildCompoundTerrain)
{
var numChildren = sceneSettings.NumChildren;
var instances = new NativeArray <CompoundCollider.ColliderBlobInstance>(numChildren, Allocator.Temp);
for (int i = 0; i < numChildren; i++)
{
instances[i] = new CompoundCollider.ColliderBlobInstance
{
Collider = collider,
CompoundFromChild = new RigidTransform
{
pos = new float3((i % 2) * scale.x * (size.x - 1), 0.0f, (i / 2) * scale.z * (size.y - 1)),
rot = quaternion.identity
}
};
}
collider = Unity.Physics.CompoundCollider.Create(instances);
CreatedColliders.Add(collider);
instances.Dispose();
}
float3 position = new float3(size.x - 1, 0.0f, size.y - 1) * scale * -0.5f;
staticEntity = CreateStaticBody(position, quaternion.identity, collider);
}
}
