private void DoVertexStreamsGUI(RenderMode renderMode)
{
ParticleSystemRenderer renderer = m_ParticleSystemUI.m_ParticleSystems[0].GetComponent <ParticleSystemRenderer>();
// render list
m_NumTexCoords = 0;
m_TexCoordChannelIndex = 0;
m_NumInstancedStreams = 0;
m_HasTangent = false;
m_HasColor = false;
m_HasGPUInstancing = (renderMode == RenderMode.Mesh) ? renderer.supportsMeshInstancing : false;
m_VertexStreamsList.DoLayoutList();
if (!m_ParticleSystemUI.multiEdit)
{
// error messages
string errors = "";
// check we have the same streams as the assigned shader
if (m_Material != null)
{
Material material = m_Material.objectReferenceValue as Material;
int totalChannelCount = m_NumTexCoords * 4 + m_TexCoordChannelIndex;
bool tangentError = false, colorError = false, uvError = false;
bool anyErrors = ParticleSystem.CheckVertexStreamsMatchShader(m_HasTangent, m_HasColor, totalChannelCount, material, ref tangentError, ref colorError, ref uvError);
if (anyErrors)
{
errors += "Vertex streams do not match the shader inputs. Particle systems may not render correctly. Ensure your streams match and are used by the shader.";
if (tangentError)
{
errors += "\n- TANGENT stream does not match.";
}
if (colorError)
{
errors += "\n- COLOR stream does not match.";
}
if (uvError)
{
errors += "\n- TEXCOORD streams do not match.";
}
}
}
// check we aren't using too many texcoords
int maxTexCoords = ParticleSystem.GetMaxTexCoordStreams();
if (m_NumTexCoords > maxTexCoords || (m_NumTexCoords == maxTexCoords && m_TexCoordChannelIndex > 0))
{
if (errors != "")
{
errors += "\n\n";
}
errors += "Only " + maxTexCoords + " TEXCOORD streams are supported.";
}
// check input meshes aren't using too many UV streams
if (renderMode == RenderMode.Mesh)
{
Mesh[] meshes = new Mesh[k_MaxNumMeshes];
int numMeshes = renderer.GetMeshes(meshes);
for (int i = 0; i < numMeshes; i++)
{
if (meshes[i].HasChannel(VertexAttribute.TexCoord2))
{
if (errors != "")
{
errors += "\n\n";
}
errors += "Meshes may only use a maximum of 2 input UV streams.";
}
}
}
if (errors != "")
{
GUIContent warning = EditorGUIUtility.TextContent(errors);
EditorGUILayout.HelpBox(warning.text, MessageType.Error, true);
}
}
}
