void GradientField::createTriangleModel()
{
vector<ofVec3f> verts;
vector<ofIndexType> indices;
float centerSize = 30;
float rad = getHeight()/2 - centerSize;
ofVec3f cornerVec(0, -centerSize);
ofVec3f triangleVec(0, -rad);
ofVec3f center(getWidth()/2, getHeight()/2, 0);
ofVec3f triangleCorners[3][3];
triangleCorners[0][0] = center + cornerVec.getRotated(120, ofVec3f(0, 0, 1));
triangleCorners[0][1] = triangleCorners[0][0] + triangleVec.getRotated(60, ofVec3f(0, 0, 1));
triangleCorners[0][2] = triangleCorners[0][0] + triangleVec.getRotated(180, ofVec3f(0, 0, 1));
triangleCorners[1][0] = center + cornerVec.getRotated(240, ofVec3f(0, 0, 1));
triangleCorners[1][1] = triangleCorners[1][0] + triangleVec.getRotated(180, ofVec3f(0, 0, 1));
triangleCorners[1][2] = triangleCorners[1][0] + triangleVec.getRotated(-60, ofVec3f(0, 0, 1));
triangleCorners[2][0] = center + cornerVec;
triangleCorners[2][1] = triangleCorners[2][0] + triangleVec.getRotated(-60, ofVec3f(0, 0, 1));
triangleCorners[2][2] = triangleCorners[2][0] + triangleVec.getRotated(60, ofVec3f(0, 0, 1));
for (int t=0; t<3; t++) {
for (int i=0; i<3; i++) {
verts.push_back(triangleCorners[t][i]);
}
}
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
indices.push_back(0);
}
// Cubelet-corner sampling function.
void CubePolygonizer::evaluateCubelet(float cubeValues[8])
{
assert(sampler != 0);
assert(currCube != 0);
// Loop unrolled to avoid bizarre table lookup weirdness... it's more readable this way, honest!
// Lookup table from MarchingCube.h:
// 0: (0,0,0)
// 1: (1,0,0)
// 2: (1,1,0)
// 3: (0,1,0)
// 4: (0,0,1)
// 5: (1,0,1)
// 6: (1,1,1)
// 7: (0,1,1)
IntVector cornerVec(currCube->getLocation().cell);
float* valueFind;
Vector v0;
// Corner 0
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(0)[0], currCube->getCorner(0)[1], currCube->getCorner(0)[2]);
cubeValues[0] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[0]);
}
else
{
cubeValues[0] = *valueFind;
}
// Corner 1
cornerVec.cell[0]++;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(1)[0], currCube->getCorner(1)[1], currCube->getCorner(1)[2]);
cubeValues[1] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[1]);
}
else
{
cubeValues[1] = *valueFind;
}
// Corner 2
cornerVec.cell[1]++;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(2)[0], currCube->getCorner(2)[1], currCube->getCorner(2)[2]);
cubeValues[2] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[2]);
}
else
{
cubeValues[2] = *valueFind;
}
// Corner 3
cornerVec.cell[0]--;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(3)[0], currCube->getCorner(3)[1], currCube->getCorner(3)[2]);
cubeValues[3] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[3]);
}
else
{
cubeValues[3] = *valueFind;
}
// Corner 4
cornerVec.cell[1]--;
cornerVec.cell[2]++;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(4)[0], currCube->getCorner(4)[1], currCube->getCorner(4)[2]);
cubeValues[4] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[4]);
}
else
{
cubeValues[4] = *valueFind;
}
// Corner 5
cornerVec.cell[0]++;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(5)[0], currCube->getCorner(5)[1], currCube->getCorner(5)[2]);
cubeValues[5] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[5]);
}
else
{
cubeValues[5] = *valueFind;
}
// Corner 6
cornerVec.cell[1]++;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(6)[0], currCube->getCorner(6)[1], currCube->getCorner(6)[2]);
cubeValues[6] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[6]);
}
else
{
cubeValues[6] = *valueFind;
}
// Corner 7
cornerVec.cell[0]--;
if ((valueFind = cornerValueCache.find(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2])) == 0)
{
v0 = Vector(currCube->getCorner(7)[0], currCube->getCorner(7)[1], currCube->getCorner(7)[2]);
cubeValues[7] = sampler->getValueAt(v0);
cornerValueCache.insert(cornerVec.cell[0], cornerVec.cell[1], cornerVec.cell[2], cubeValues[7]);
}
else
{
cubeValues[7] = *valueFind;
}
}
