void Patch::UpdateHeightMap(const SRectangle& rect)
{
if (vertices.empty()) {
vertices.resize(3 * (PATCH_SIZE + 1) * (PATCH_SIZE + 1));
unsigned int index = 0;
// initialize vertices
for (int z = coors.y; z <= (coors.y + PATCH_SIZE); z++) {
for (int x = coors.x; x <= (coors.x + PATCH_SIZE); x++) {
vertices[index++] = x * SQUARE_SIZE;
vertices[index++] = 0.0f;
vertices[index++] = z * SQUARE_SIZE;
}
}
}
const float* hMap = readMap->GetCornerHeightMapUnsynced();
for (int z = rect.z1; z <= rect.z2; z++) {
for (int x = rect.x1; x <= rect.x2; x++) {
const int vindex = (z * (PATCH_SIZE + 1) + x) * 3;
const int xw = x + coors.x;
const int zw = z + coors.y;
// only update y-coord
vertices[vindex + 1] = hMap[zw * mapDims.mapxp1 + xw];
}
}
VBOUploadVertices();
isDirty = true;
}
void Patch::Upload()
{
switch (renderMode) {
case DL: {
glNewList(triList, GL_COMPILE);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, &vertices[0]);
glDrawRangeElements(GL_TRIANGLES, 0, vertices.size(), indices.size(), GL_UNSIGNED_INT, &indices[0]);
glDisableClientState(GL_VERTEX_ARRAY);
glEndList();
} break;
case VBO: {
if (!vboVerticesUploaded) VBOUploadVertices();
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, vertexIndexBuffer);
glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, indices.size() * sizeof(unsigned), &indices[0], GL_DYNAMIC_DRAW_ARB);
/*
int bufferSize = 0;
glGetBufferParameterivARB(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_BUFFER_SIZE_ARB, &bufferSize);
if(rend != bufferSize) {
glDeleteBuffersARB(1, &vertexIndexBuffer);
LOG( "[createVBO()] Data size is mismatch with input array\n" );
}
*/
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
} break;
default: {
} break;
}
}
void Patch::UpdateHeightMap(const SRectangle& rect)
{
if (vertices.empty()) {
// Initialize
vertices.resize(3 * (PATCH_SIZE + 1) * (PATCH_SIZE + 1));
int index = 0;
for (int z = m_WorldY; z <= (m_WorldY + PATCH_SIZE); z++) {
for (int x = m_WorldX; x <= (m_WorldX + PATCH_SIZE); x++) {
vertices[index++] = x * SQUARE_SIZE;
vertices[index++] = 0.0f;
vertices[index++] = z * SQUARE_SIZE;
}
}
}
static const float* hMap = readmap->GetCornerHeightMapUnsynced();
for (int z = rect.z1; z <= rect.z2; z++) {
for (int x = rect.x1; x <= rect.x2; x++) {
const float& h = hMap[(z + m_WorldY) * gs->mapxp1 + (x + m_WorldX)];
const int vindex = (z * (PATCH_SIZE + 1) + x) * 3;
vertices[vindex + 1] = h; // only update Y coord
//if (h < minHeight) minHeight = h;
//if (h > maxHeight) maxHeight = h;
}
}
VBOUploadVertices();
m_isDirty = true;
}