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only allow VBO re-transfer every 5 seconds for test

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This commit is contained in:
Stephen Birarda 2013-04-01 14:08:42 -07:00
parent ebe11151f4
commit 793ac841f2
2 changed files with 11 additions and 5 deletions
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15
interface/src/VoxelSystem.cpp
View file

@ -40,6 +40,8 @@ VoxelSystem::VoxelSystem() {
voxelsRendered = 0;
tree = new VoxelTree();
pthread_mutex_init(&bufferWriteLock, NULL);
lastBufferCopy.tv_sec = 0;
lastBufferCopy.tv_usec = 0;
}
VoxelSystem::~VoxelSystem() {
@ -185,11 +187,11 @@ VoxelSystem* VoxelSystem::clone() const {
void VoxelSystem::init() {
// prep the data structures for incoming voxel data
writeVerticesArray = new GLfloat[VERTEX_POINTS_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
readVerticesArray = new GLfloat[VERTEX_POINTS_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
writeVerticesEndPointer = writeVerticesArray = new GLfloat[VERTEX_POINTS_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
readVerticesEndPointer = readVerticesArray = new GLfloat[VERTEX_POINTS_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
writeColorsArray = new GLubyte[VERTEX_POINTS_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
readColorsArray = new GLubyte[VERTEX_POINTS_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
GLuint *indicesArray = new GLuint[INDICES_PER_VOXEL * MAX_VOXELS_PER_SYSTEM];
// populate the indicesArray
@ -231,8 +233,9 @@ void VoxelSystem::render() {
glPushMatrix();
if (readVerticesEndPointer != readVerticesArray) {
double timeSinceLastDraw = usecTimestampNow() - usecTimestamp(&lastBufferCopy);
if (readVerticesEndPointer != readVerticesArray && timeSinceLastDraw >= 5000 * 1000) {
printf("The time since the last draw was %f\n", timeSinceLastDraw);
// try to lock on the buffer write
// just avoid pulling new data if it is currently being written
if (pthread_mutex_trylock(&bufferWriteLock) == 0) {
@ -249,6 +252,8 @@ void VoxelSystem::render() {
pthread_mutex_unlock(&bufferWriteLock);
}
gettimeofday(&lastBufferCopy, NULL);
}
// tell OpenGL where to find vertex and color information

1
interface/src/VoxelSystem.h
View file

@ -51,6 +51,7 @@ private:
GLuint vboColorsID;
GLuint vboIndicesID;
pthread_mutex_t bufferWriteLock;
timeval lastBufferCopy;
int treeToArrays(VoxelNode *currentNode, float nodePosition[3]);
void setupNewVoxelsForDrawing();