QwtDoubleRect ImageMarker::boundingRect() const
{
return QwtDoubleRect(xValue(), yValue(), qAbs(d_x_right - xValue()), qAbs(d_y_bottom - yValue()));
}
void ellipsoidWireFrame() {
static GLuint vertBuffer;
static GLuint normalsBuffer;
static GLuint indexBuffer;
static GLboolean first = GL_TRUE;
GLfloat u,v;
int m,n;
int cnt=0;
if (first || changeFlag) {
for (n=0; n <= BIG_N; n++) {
v = -M_PI/2.0 + (float) n/ (float) BIG_N * M_PI;
for (m=0; m <= BIG_M; m++) {
u = -M_PI + (float) m/ (float) BIG_M * 2.0 * M_PI;
verticesArray[cnt] = xValue(u,v);
normalsArray[cnt] = nxValue(u,v);
cnt++;
verticesArray[cnt] = yValue(u,v);
normalsArray[cnt] = nyValue(u,v);
cnt++;
verticesArray[cnt] = zValue(u,v);
normalsArray[cnt] = nzValue(u,v);
cnt++;
}
}
glGenBuffers(1, &vertBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(verticesArray),
verticesArray, GL_STATIC_DRAW);
glGenBuffers(1, &normalsBuffer);
glBindBuffer(GL_ARRAY_BUFFER,normalsBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(normalsArray),
normalsArray, GL_STATIC_DRAW);
if (first) {
createMeshStripIndices();
glGenBuffers(1, &indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(tubeStrips),
tubeStrips, GL_STATIC_DRAW);
}
first = GL_FALSE;
changeFlag = GL_FALSE;
}
loadUniforms();
glEnableVertexAttribArray(vertexPositionAttr);
glBindBuffer(GL_ARRAY_BUFFER, vertBuffer);
glVertexAttribPointer(vertexPositionAttr,3, GL_FLOAT,GL_FALSE, 0, (GLvoid*) 0);
glBindBuffer(GL_ARRAY_BUFFER, normalsBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,indexBuffer);
glDrawElements(GL_QUAD_STRIP, TOTAL_INDICES, GL_UNSIGNED_SHORT, (GLvoid*) 0);
}