private void Update()
{
if (Input.GetKeyDown(KeyCode.C))
{
// Remove all projectors.
while (m_DecalProjectors.Count > 0)
{
m_DecalsMesh.ClearAll();
m_DecalProjectors.Clear();
// Clearing of the decals mesh means we need to initialize it again.
m_DecalsMesh.Initialize(m_DecalsInstance);
}
m_DecalsInstance.UpdateDecalsMeshes(m_DecalsMesh);
}
if (Input.GetButtonDown("Fire1"))
{
Ray l_Ray = Camera.main.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0.0f));
RaycastHit l_RaycastHit;
if (Physics.Raycast(l_Ray, out l_RaycastHit, Mathf.Infinity))
{
// Collider hit.
// Make sure there are not too many projectors.
if (m_DecalProjectors.Count >= m_MaximumNumberOfProjectors)
{
// If there are more than the maximum number of projectors, we delete
// the oldest one.
DecalProjector l_DecalProjector = m_DecalProjectors [0];
m_DecalProjectors.RemoveAt(0);
m_DecalsMesh.RemoveProjector(l_DecalProjector);
}
// Calculate the position and rotation for the new decal projector.
Vector3 l_ProjectorPosition = l_RaycastHit.point - (m_DecalProjectorOffset * l_Ray.direction.normalized);
Quaternion l_ProjectorRotation = ProjectorRotationUtility.ProjectorRotation(Camera.main.transform.forward, Vector3.up);
// Randomize the rotation.
Quaternion l_RandomRotation = Quaternion.Euler(0.0f, Random.Range(0.0f, 360.0f), 0.0f);
l_ProjectorRotation = l_ProjectorRotation * l_RandomRotation;
TerrainCollider l_TerrainCollider = l_RaycastHit.collider as TerrainCollider;
if (l_TerrainCollider != null)
{
// Terrain collider hit.
Terrain l_Terrain = l_TerrainCollider.GetComponent <Terrain> ();
if (l_Terrain != null)
{
// Create the decal projector with all the required information.
DecalProjector l_DecalProjector = new DecalProjector(l_ProjectorPosition, l_ProjectorRotation, m_DecalProjectorScale, m_CullingAngle, m_MeshOffset, m_UVRectangleIndex, m_UVRectangleIndex);
// Add the projector to our list and the decals mesh, such that both are
// synchronized. All the mesh data that is now added to the decals mesh
// will belong to this projector.
m_DecalProjectors.Add(l_DecalProjector);
m_DecalsMesh.AddProjector(l_DecalProjector);
// The terrain data has to be converted to the decals instance's space.
Matrix4x4 l_TerrainToDecalsMatrix = m_WorldToDecalsMatrix * Matrix4x4.TRS(l_Terrain.transform.position, Quaternion.identity, Vector3.one);
// Pass the terrain data with the corresponding conversion to the decals mesh.
m_DecalsMesh.Add(l_Terrain, l_TerrainToDecalsMatrix);
// Cut and offset the decals mesh.
m_DecalsMeshCutter.CutDecalsPlanes(m_DecalsMesh);
m_DecalsMesh.OffsetActiveProjectorVertices();
// The changes are only present in the decals mesh at the moment. We have
// to pass them to the decals instance to visualize them.
m_DecalsInstance.UpdateDecalsMeshes(m_DecalsMesh);
// For the next hit, use a new uv rectangle. Usually, you would select the uv rectangle
// based on the surface you have hit.
NextUVRectangleIndex();
}
else
{
Debug.LogError("Terrain is null!");
}
}
else
{
// We hit a collider. Next we have to find the mesh that belongs to the collider.
// That step depends on how you set up your mesh filters and collider relative to
// each other in the game objects. It is important to have a consistent way in order
// to have a simpler implementation.
MeshCollider l_MeshCollider = l_RaycastHit.collider.GetComponent <MeshCollider> ();
MeshFilter l_MeshFilter = l_RaycastHit.collider.GetComponent <MeshFilter> ();
if (l_MeshCollider != null || l_MeshFilter != null)
{
Mesh l_Mesh = null;
if (l_MeshCollider != null)
{
// Mesh collider was hit. Just use the mesh data from that one.
l_Mesh = l_MeshCollider.sharedMesh;
}
else if (l_MeshFilter != null)
{
// Otherwise take the data from the shared mesh.
l_Mesh = l_MeshFilter.sharedMesh;
}
if (l_Mesh != null)
{
// Create the decal projector.
DecalProjector l_DecalProjector = new DecalProjector(l_ProjectorPosition, l_ProjectorRotation, m_DecalProjectorScale, m_CullingAngle, m_MeshOffset, m_UVRectangleIndex, m_UVRectangleIndex);
// Add the projector to our list and the decals mesh, such that both are
// synchronized. All the mesh data that is now added to the decals mesh
// will belong to this projector.
m_DecalProjectors.Add(l_DecalProjector);
m_DecalsMesh.AddProjector(l_DecalProjector);
// Get the required matrices.
Matrix4x4 l_WorldToMeshMatrix = l_RaycastHit.collider.renderer.transform.worldToLocalMatrix;
Matrix4x4 l_MeshToWorldMatrix = l_RaycastHit.collider.renderer.transform.localToWorldMatrix;
// Add the mesh data to the decals mesh, cut and offset it.
m_DecalsMesh.Add(l_Mesh, l_WorldToMeshMatrix, l_MeshToWorldMatrix);
m_DecalsMeshCutter.CutDecalsPlanes(m_DecalsMesh);
m_DecalsMesh.OffsetActiveProjectorVertices();
// The changes are only present in the decals mesh at the moment. We have
// to pass them to the decals instance to visualize them.
m_DecalsInstance.UpdateDecalsMeshes(m_DecalsMesh);
// For the next hit, use a new uv rectangle. Usually, you would select the uv rectangle
// based on the surface you have hit.
NextUVRectangleIndex();
}
}
}
}
}
}
private void Update()
{
if (Input.GetButtonDown("Fire1"))
{
Ray l_Ray = Camera.main.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0.0f));
RaycastHit l_RaycastHit;
// Terrains have no uv2, so we just skip them.
if
(Physics.Raycast(l_Ray, out l_RaycastHit, Mathf.Infinity) &&
l_RaycastHit.collider as TerrainCollider == null)
{
// Collider hit.
// Make sure there are not too many decals instances.
if (m_DecalsInstances.Count >= 50)
{
m_DecalsInstances.RemoveAt(0);
}
// Instantiate the prefab and get its decals instance.
GameObject l_Instance = Instantiate(decalsPrefab) as GameObject;
DS_Decals l_Decals = l_Instance.GetComponentInChildren <DS_Decals> ();
// Reuse the decals mesh, but be sure to initialize it always for the current
// decals instance.
m_DecalsMesh.Initialize(l_Decals);
// Calculate the position and rotation for the new decal projector.
Vector3 l_ProjectorPosition = l_RaycastHit.point - (decalProjectorOffset * l_Ray.direction.normalized);
Vector3 l_ForwardDirection = Camera.main.transform.up;
Vector3 l_UpDirection = -Camera.main.transform.forward;
Quaternion l_ProjectorRotation = Quaternion.LookRotation(l_ForwardDirection, l_UpDirection);
// Randomize the rotation.
Quaternion l_RandomRotation = Quaternion.Euler(0.0f, Random.Range(0.0f, 360.0f), 0.0f);
l_ProjectorRotation = l_ProjectorRotation * l_RandomRotation;
// We hit a collider. Next we have to find the mesh that belongs to the collider.
// That step depends on how you set up your mesh filters and collider relative to
// each other in the game objects. It is important to have a consistent way in order
// to have a simpler implementation.
MeshCollider l_MeshCollider = l_RaycastHit.collider.GetComponent <MeshCollider> ();
MeshFilter l_MeshFilter = l_RaycastHit.collider.GetComponent <MeshFilter> ();
MeshRenderer l_MeshRenderer = l_RaycastHit.collider.GetComponent <MeshRenderer> ();
if (l_MeshCollider != null || l_MeshFilter != null)
{
Mesh l_Mesh = null;
if (l_MeshCollider != null)
{
// Mesh collider was hit. Just use the mesh data from that one.
l_Mesh = l_MeshCollider.sharedMesh;
}
else if (l_MeshFilter != null)
{
// Otherwise take the data from the shared mesh.
l_Mesh = l_MeshFilter.sharedMesh;
}
if (l_Mesh != null)
{
// Create the decal projector.
DecalProjector l_DecalProjector = new DecalProjector(l_ProjectorPosition, l_ProjectorRotation, decalProjectorScale, cullingAngle, meshOffset, m_UVRectangleIndex, m_UVRectangleIndex);
// All the mesh data that is now added to the decals mesh
// will belong to this projector.
m_DecalsMesh.AddProjector(l_DecalProjector);
// Get the required matrices.
Matrix4x4 l_WorldToMeshMatrix = l_RaycastHit.collider.renderer.transform.worldToLocalMatrix;
Matrix4x4 l_MeshToWorldMatrix = l_RaycastHit.collider.renderer.transform.localToWorldMatrix;
// Add the mesh data to the decals mesh, cut and offset it before we pass it
// to the decals instance to be displayed.
m_DecalsMesh.Add(l_Mesh, l_WorldToMeshMatrix, l_MeshToWorldMatrix);
m_DecalsMeshCutter.CutDecalsPlanes(m_DecalsMesh);
m_DecalsMesh.OffsetActiveProjectorVertices();
l_Decals.UpdateDecalsMeshes(m_DecalsMesh);
// Lightmapping
l_Decals.DecalsMeshRenderers [0].MeshRenderer.lightmapIndex = l_MeshRenderer.lightmapIndex;
l_Decals.DecalsMeshRenderers [0].MeshRenderer.lightmapTilingOffset = l_MeshRenderer.lightmapTilingOffset;
// For the next hit, use a new uv rectangle. Usually, you would select the uv rectangle
// based on the surface you have hit.
NextUVRectangleIndex(l_Decals);
}
}
}
}
}
