1 files changed, 49 insertions, 9 deletions

diff --git a/NvCloth/samples/SampleBase/renderer/CustomRenderMesh.cpp b/NvCloth/samples/SampleBase/renderer/CustomRenderMesh.cpp
index 8dfbbb6..c634921 100644
--- a/NvCloth/samples/SampleBase/renderer/CustomRenderMesh.cpp
+++ b/NvCloth/samples/SampleBase/renderer/CustomRenderMesh.cpp
@@ -9,7 +9,7 @@
 */
 
 #include "CustomRenderMesh.h"
-
+#include <assert.h>
 
 CustomRenderMesh::CustomRenderMesh()
 	: m_indexBuffer(nullptr)
@@ -17,14 +17,14 @@ CustomRenderMesh::CustomRenderMesh()
 }
 
 CustomRenderMesh::CustomRenderMesh(const void* vertices, uint32_t numVertices, uint32_t vertexSize, 
-							std::vector<D3D11_INPUT_ELEMENT_DESC>& inputDesc, const uint16_t* faces, uint32_t numFaces)
+							std::vector<D3D11_INPUT_ELEMENT_DESC>& inputDesc, const uint16_t* faces, uint32_t numFaces, int flags)
 	: m_indexBuffer(nullptr)
 {
-	initialize(vertices, numVertices, vertexSize, inputDesc, faces, numFaces);
+	initialize(vertices, numVertices, vertexSize, inputDesc, faces, numFaces, flags);
 }
 
 void CustomRenderMesh::initialize(const void* vertices, uint32_t numVertices, uint32_t vertexSize, 
-							std::vector<D3D11_INPUT_ELEMENT_DESC>& inputDesc, const uint16_t* faces, uint32_t numFaces)
+							std::vector<D3D11_INPUT_ELEMENT_DESC>& inputDesc, const uint16_t* faces, uint32_t numFaces, int flags)
 {
 	ID3D11Device* device = GetDeviceManager()->GetDevice();
 
@@ -32,6 +32,8 @@ void CustomRenderMesh::initialize(const void* vertices, uint32_t numVertices, ui
 	m_numVertices = numVertices;
 	m_vertexSize = vertexSize;
 	m_numFaces = numFaces;
+	m_vertexCapacity = max(1,numVertices);
+	m_indexCapacity = max(1,numFaces);
 
 	// VB
 	{
@@ -40,16 +42,26 @@ void CustomRenderMesh::initialize(const void* vertices, uint32_t numVertices, ui
 		ZeroMemory(&vertexBufferData, sizeof(vertexBufferData));
 		vertexBufferData.pSysMem = vertices;
 
+		void* backupBuffer = nullptr;
+		if(vertices == nullptr)
+		{
+			void* backupBuffer = malloc(vertexSize * m_vertexCapacity);
+			vertexBufferData.pSysMem = backupBuffer;
+		}
+
 		D3D11_BUFFER_DESC bufferDesc;
 
 		memset(&bufferDesc, 0, sizeof(D3D11_BUFFER_DESC));
 		bufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
-		bufferDesc.ByteWidth = vertexSize * numVertices;
-		bufferDesc.CPUAccessFlags = 0;
+		bufferDesc.ByteWidth = vertexSize * m_vertexCapacity;
+		bufferDesc.CPUAccessFlags = (flags&DYNAMIC_VERTEX_BUFFER) ? D3D11_CPU_ACCESS_WRITE : 0;
 		bufferDesc.MiscFlags = 0;
-		bufferDesc.Usage = D3D11_USAGE_IMMUTABLE;
+		bufferDesc.Usage = (flags&DYNAMIC_VERTEX_BUFFER) ? D3D11_USAGE_DYNAMIC : D3D11_USAGE_IMMUTABLE;
 
 		V(device->CreateBuffer(&bufferDesc, &vertexBufferData, &m_vertexBuffer));
+
+		if(vertices = nullptr)
+			free(backupBuffer);
 	}
 
 	// IB
@@ -60,16 +72,26 @@ void CustomRenderMesh::initialize(const void* vertices, uint32_t numVertices, ui
 		ZeroMemory(&indexBufferData, sizeof(indexBufferData));
 		indexBufferData.pSysMem = faces;
 
+		void* backupBuffer = nullptr;
+		if(faces == nullptr)
+		{
+			void* backupBuffer = malloc(sizeof(uint16_t) * m_indexCapacity);
+			indexBufferData.pSysMem = backupBuffer;
+		}
+
 		D3D11_BUFFER_DESC bufferDesc;
 
 		memset(&bufferDesc, 0, sizeof(D3D11_BUFFER_DESC));
 		bufferDesc.BindFlags = D3D11_BIND_INDEX_BUFFER;
-		bufferDesc.ByteWidth = sizeof(uint16_t) * numFaces;
+		bufferDesc.ByteWidth = sizeof(uint16_t) * m_indexCapacity;
 		bufferDesc.CPUAccessFlags = 0;
 		bufferDesc.MiscFlags = 0;
 		bufferDesc.Usage = D3D11_USAGE_IMMUTABLE;
 
 		V(device->CreateBuffer(&bufferDesc, &indexBufferData, &m_indexBuffer));
+
+		if(faces = nullptr)
+			free(backupBuffer);
 	}
 }
 
@@ -79,8 +101,26 @@ CustomRenderMesh::~CustomRenderMesh()
 	SAFE_RELEASE(m_indexBuffer);
 }
 
+void CustomRenderMesh::updateVertices(const void* vertices, uint32_t numVertices, uint32_t vertexSize)
+{
+	assert(numVertices <= m_vertexCapacity);
+	assert(vertexSize == m_vertexSize);
+	ID3D11Device* device = GetDeviceManager()->GetDevice();
+	ID3D11DeviceContext* context;
+	device->GetImmediateContext(&context);
+
+	D3D11_MAPPED_SUBRESOURCE mappedResource;
+	ZeroMemory(&mappedResource, sizeof(D3D11_MAPPED_SUBRESOURCE));
+
+	context->Map(m_vertexBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
+	//	Update the vertex buffer here.
+	memcpy(mappedResource.pData, vertices, vertexSize*numVertices);
+	//	Reenable GPU access to the vertex buffer data.
+	context->Unmap(m_vertexBuffer, 0);
+}
+
 
-void CustomRenderMesh::render(ID3D11DeviceContext& context) const
+void CustomRenderMesh::render(ID3D11DeviceContext& context, int submesh) const
 {
 	context.IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);