void HardwareBuffer::copyData(HardwareBuffer& srcBuffer, size_t srcOffset, size_t dstOffset, size_t length, BOOL discardWholeBuffer /* = FALSE */)
{
const void* srcData = srcBuffer.lock(srcOffset, length, HBL_READ_ONLY);
this->writeData(dstOffset, length, srcData, discardWholeBuffer);
srcBuffer.unlock();
}
namespace PointRenderer {
HardwareBuffer buffer;
HardwareBuffer::VBOStruct VBOInfo;
std::vector<Vector3> pointList;
float* vertexBufferData = NULL;
long vertexBufferDataSize = 0;
GLSLShader pointProgram;
void mapVectorToArray(const std::vector<Vector3>& list) {
if (vertexBufferDataSize < list.size() * 3) {
if (vertexBufferData != NULL) {
delete[] vertexBufferData;
vertexBufferData = NULL;
}
vertexBufferData = new float[list.size() * 3 * 2];
vertexBufferDataSize = list.size() * 3 * 2;
}
for (int i = 0; i < list.size(); ++i) {
vertexBufferData[3 * i + 0] = list[i].x;
vertexBufferData[3 * i + 1] = list[i].y;
vertexBufferData[3 * i + 2] = list[i].z;
}
}
void generateVertexBuffer() {
mapVectorToArray(pointList);
}
void init() {
pointList.clear();
pointList.push_back(Vector3(0, 0, 0));
generateVertexBuffer();
VBOInfo.vertexBufferSize = static_cast<int>(pointList.size()) * 3;
VBOInfo.vertexBufferData = vertexBufferData;
buffer.initVBO(VBOInfo, HardwareBuffer::FLAG_VERTEX_BUFFER);
buffer.setVBOLocation(HardwareBuffer::FLAG_VERTEX_BUFFER, 0);
buffer.setVBOUnitSize(HardwareBuffer::FLAG_VERTEX_BUFFER, 3);
pointProgram.loadFromFile(GL_VERTEX_SHADER, "Shader/point.vs");
pointProgram.loadFromFile(GL_FRAGMENT_SHADER, "Shader/point.fs");
pointProgram.loadFromFile(GL_GEOMETRY_SHADER, "Shader/point.gs");
pointProgram.createProgram();
}
void render(uint textureId) {
pointProgram.bind();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, textureId);
generateVertexBuffer();
HardwareBuffer::VBOStruct _VBO;
_VBO.vertexBufferData = vertexBufferData;
_VBO.vertexBufferSize = static_cast<int>(pointList.size()) * 3;
buffer.updateVBO(_VBO, HardwareBuffer::FLAG_VERTEX_BUFFER);
buffer.render(GL_POINTS);
glDisable(GL_BLEND);
pointProgram.unbind();
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
}
GLSLShader* getPointShader() {
return &pointProgram;
}
std::vector<Vector3>& getPointList() {
return pointList;
}
void release() {
if (vertexBufferData != NULL) {
delete[] vertexBufferData;
vertexBufferData = NULL;
}
}
}