void DebugDrawer::buildTriangle(const Ogre::Vector3 *vertices, const Ogre::ColourValue& colour, float alpha)
{
int index = addLineVertex(vertices[0], Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineVertex(vertices[1], Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineVertex(vertices[2], Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
for (int i = 0; i < 3; ++i) addLineIndices(index + i, index + ((i + 1) % 3));
}
void DebugDrawer::buildLine(const Ogre::Vector3& start,
const Ogre::Vector3& end,
const Ogre::ColourValue& colour,
float alpha)
{
int i = addLineVertex(start, Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineVertex(end, Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineIndices(i, i + 1);
}
void DebugDrawer::buildTetrahedron(const Ogre::Vector3 ¢re,
float scale,
const Ogre::ColourValue &colour,
float alpha)
{
int index = linesIndex;
// Distance from the centre
float bottomDistance = scale * 0.2f;
float topDistance = scale * 0.62f;
float frontDistance = scale * 0.289f;
float backDistance = scale * 0.577f;
float leftRightDistance = scale * 0.5f;
addLineVertex(Ogre::Vector3(centre.x, centre.y + topDistance, centre.z),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineVertex(Ogre::Vector3(centre.x, centre.y - bottomDistance, centre.z + frontDistance),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineVertex(Ogre::Vector3(centre.x + leftRightDistance, centre.y - bottomDistance, centre.z - backDistance),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineVertex(Ogre::Vector3(centre.x - leftRightDistance, centre.y - bottomDistance, centre.z - backDistance),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
addLineIndices(index, index + 1);
addLineIndices(index, index + 2);
addLineIndices(index, index + 3);
addLineIndices(index + 1, index + 2);
addLineIndices(index + 2, index + 3);
addLineIndices(index + 3, index + 1);
}
void DebugDrawer::buildCylinder(const Ogre::Vector3 ¢re,
float radius,
int segmentsCount,
float height,
const Ogre::ColourValue& colour,
float alpha)
{
int index = linesIndex;
float increment = 2 * Ogre::Math::PI / segmentsCount;
float angle = 0.0f;
// Top circle
for (int i = 0; i < segmentsCount; i++)
{
addLineVertex(Ogre::Vector3(centre.x + radius * Ogre::Math::Cos(angle), centre.y + height / 2, centre.z + radius * Ogre::Math::Sin(angle)),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
angle += increment;
}
angle = 0.0f;
// Bottom circle
for (int i = 0; i < segmentsCount; i++)
{
addLineVertex(Ogre::Vector3(centre.x + radius * Ogre::Math::Cos(angle), centre.y - height / 2, centre.z + radius * Ogre::Math::Sin(angle)),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
angle += increment;
}
for (int i = 0; i < segmentsCount; i++)
{
addLineIndices(index + i, i + 1 < segmentsCount ? index + i + 1 : index);
addLineIndices(segmentsCount + index + i, i + 1 < segmentsCount ? segmentsCount + index + i + 1 : segmentsCount + index);
addLineIndices(index + i, segmentsCount + index + i);
}
}
void DebugDrawer::buildCuboid(const Ogre::Vector3 *vertices,
const Ogre::ColourValue& colour,
float alpha)
{
int index = addLineVertex(vertices[0], Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
for (int i = 1; i < 8; ++i) addLineVertex(vertices[i], Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
for (int i = 0; i < 4; ++i) addLineIndices(index + i, index + ((i + 1) % 4));
for (int i = 4; i < 8; ++i) addLineIndices(index + i, i == 7 ? index + 4 : index + i + 1);
addLineIndices(index + 1, index + 5);
addLineIndices(index + 2, index + 4);
addLineIndices(index, index + 6);
addLineIndices(index + 3, index + 7);
}
void DebugDrawer::buildCircle(const Ogre::Vector3 ¢re,
float radius,
int segmentsCount,
const Ogre::ColourValue& colour,
float alpha)
{
int index = linesIndex;
float increment = 2 * Ogre::Math::PI / segmentsCount;
float angle = 0.0f;
for (int i = 0; i < segmentsCount; i++)
{
addLineVertex(Ogre::Vector3(centre.x + radius * Ogre::Math::Cos(angle), centre.y, centre.z + radius * Ogre::Math::Sin(angle)),
Ogre::ColourValue(colour.r, colour.g, colour.b, alpha));
angle += increment;
}
for (int i = 0; i < segmentsCount; i++)
addLineIndices(index + i, i + 1 < segmentsCount ? index + i + 1 : index);
}
void IcoSphere::create(int recursionLevel)
{
vertices.clear();
lineIndices.clear();
triangleIndices.clear();
faces.clear();
middlePointIndexCache.clear();
index = 0;
float t = (1.0f + Ogre::Math::Sqrt(5.0f)) / 2.0f;
addVertex(Ogre::Vector3(-1.0f, t, 0.0f));
addVertex(Ogre::Vector3( 1.0f, t, 0.0f));
addVertex(Ogre::Vector3(-1.0f, -t, 0.0f));
addVertex(Ogre::Vector3( 1.0f, -t, 0.0f));
addVertex(Ogre::Vector3( 0.0f, -1.0f, t));
addVertex(Ogre::Vector3( 0.0f, 1.0f, t));
addVertex(Ogre::Vector3( 0.0f, -1.0f, -t));
addVertex(Ogre::Vector3( 0.0f, 1.0f, -t));
addVertex(Ogre::Vector3( t, 0.0f, -1.0f));
addVertex(Ogre::Vector3( t, 0.0f, 1.0f));
addVertex(Ogre::Vector3(-t, 0.0f, -1.0f));
addVertex(Ogre::Vector3(-t, 0.0f, 1.0f));
addFace(0, 11, 5);
addFace(0, 5, 1);
addFace(0, 1, 7);
addFace(0, 7, 10);
addFace(0, 10, 11);
addFace(1, 5, 9);
addFace(5, 11, 4);
addFace(11, 10, 2);
addFace(10, 7, 6);
addFace(7, 1, 8);
addFace(3, 9, 4);
addFace(3, 4, 2);
addFace(3, 2, 6);
addFace(3, 6, 8);
addFace(3, 8, 9);
addFace(4, 9, 5);
addFace(2, 4, 11);
addFace(6, 2, 10);
addFace(8, 6, 7);
addFace(9, 8, 1);
addLineIndices(1, 0);
addLineIndices(1, 5);
addLineIndices(1, 7);
addLineIndices(1, 8);
addLineIndices(1, 9);
addLineIndices(2, 3);
addLineIndices(2, 4);
addLineIndices(2, 6);
addLineIndices(2, 10);
addLineIndices(2, 11);
addLineIndices(0, 5);
addLineIndices(5, 9);
addLineIndices(9, 8);
addLineIndices(8, 7);
addLineIndices(7, 0);
addLineIndices(10, 11);
addLineIndices(11, 4);
addLineIndices(4, 3);
addLineIndices(3, 6);
addLineIndices(6, 10);
addLineIndices(0, 11);
addLineIndices(11, 5);
addLineIndices(5, 4);
addLineIndices(4, 9);
addLineIndices(9, 3);
addLineIndices(3, 8);
addLineIndices(8, 6);
addLineIndices(6, 7);
addLineIndices(7, 10);
addLineIndices(10, 0);
for (int i = 0; i < recursionLevel; i++)
{
std::list<TriangleIndices> faces2;
for (std::list<TriangleIndices>::iterator j = faces.begin(); j != faces.end(); j++)
{
TriangleIndices f = *j;
int a = getMiddlePoint(f.v1, f.v2);
int b = getMiddlePoint(f.v2, f.v3);
int c = getMiddlePoint(f.v3, f.v1);
removeLineIndices(f.v1, f.v2);
removeLineIndices(f.v2, f.v3);
removeLineIndices(f.v3, f.v1);
faces2.push_back(TriangleIndices(f.v1, a, c));
faces2.push_back(TriangleIndices(f.v2, b, a));
faces2.push_back(TriangleIndices(f.v3, c, b));
faces2.push_back(TriangleIndices(a, b, c));
addTriangleLines(f.v1, a, c);
addTriangleLines(f.v2, b, a);
addTriangleLines(f.v3, c, b);
}
faces = faces2;
}
}
void IcoSphere::addTriangleLines(int index0, int index1, int index2)
{
addLineIndices(index0, index1);
addLineIndices(index1, index2);
addLineIndices(index2, index0);
}