GeometryBufferPtr GizmoRotate::generateCircles()
{
// Vertex data
std::vector< Vector3 > pos;
std::vector< Vector3 > colors;
Matrix4x3 transform;
// X axis
std::vector< Vector3 > posX;
generateCircle(posX, SLICES);
generateColors(colors, X);
transform = Matrix4x3::createScale( Vector3(0.4f) );
TransformVertices(pos, posX, transform);
// Y axis
std::vector< Vector3 > posY;
generateCircle(posY, SLICES);
generateColors(colors, Y);
transform = Matrix4x3::createScale( Vector3(0.4f) );
transform = transform*Matrix4x3::createRotation( EulerAngles(0, 90, 0) );
TransformVertices(pos, posY, transform);
// Z axis
std::vector< Vector3 > posZ;
generateCircle(posZ, SLICES);
generateColors(colors, Z);
transform = Matrix4x3::createScale( Vector3(0.4f) );
transform = transform*Matrix4x3::createRotation( EulerAngles(90, 0, 0) );
TransformVertices(pos, posZ, transform);
// Translate it a bit.
transform = Matrix4x3::createTranslation( Vector3::UnitY * 0.5f );
for( uint i = 0; i < pos.size(); i++ )
{
Vector3& v = pos[i];
v = transform*v;
}
// Vertex buffer setup
GeometryBufferPtr gb = AllocateHeap(GeometryBuffer);
assert( pos.size() == colors.size() );
gb->set( VertexAttribute::Position, pos );
gb->set( VertexAttribute::Color, colors );
return gb;
}
void Cylinder::generateCylinder()
{
generateCircle();
generateWall( 1.0f, m_numDivisions);
generateWall(-1.0f, m_numDivisions);
generateSide(m_numDivisions);
}
void CylinderSlice::generateCylinder()
{
generateCircle(m_sliceAngle);
generateWall( 1.0f, m_numDivisions-1);
generateWall(-1.0f, m_numDivisions-1);
generateSide(m_numDivisions-1);
// build extra sides
if(m_sliceAngle < 360.0)
{
vec3 p1(m_circlePoints[0].x, m_circlePoints[0].y, 1.0f);
vec3 p2(0.0f, 0.0f, 1.0f);
vec3 p3(m_circlePoints[0].x, m_circlePoints[0].y, -1.0f);
vec3 p4(0.0f, 0.0f, -1.0f);
// Side 1
vec3 n = cross(p4-p2, p1-p2);
m_vertices[m_numVertices] = p1; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(0.0f, 0.0f); m_numVertices++;
m_vertices[m_numVertices] = p2; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(1.0f, 0.0f); m_numVertices++;
m_vertices[m_numVertices] = p4; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(1.0f, 1.0f); m_numVertices++;
n = cross(p3-p4, p1-p4); // value does not change
m_vertices[m_numVertices] = p4; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(1.0f, 1.0f); m_numVertices++;
m_vertices[m_numVertices] = p3; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(0.0f, 1.0f); m_numVertices++;
m_vertices[m_numVertices] = p1; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(0.0f, 0.0f); m_numVertices++;
m_edges[m_numEdges++] = p1;
m_edges[m_numEdges++] = p2;
m_edges[m_numEdges++] = p2;
m_edges[m_numEdges++] = p4;
m_edges[m_numEdges++] = p4;
m_edges[m_numEdges++] = p3;
m_edges[m_numEdges++] = p3;
m_edges[m_numEdges++] = p1;
m_cols[0].n = normalize(n);
//m_cols[0].n.y = 0.0f; m_cols[0].n.z = -1.0f;
m_cols[0].d = dot(m_cols[0].n, p4);
p1 = vec3(m_circlePoints[m_numDivisions-1].x, m_circlePoints[m_numDivisions-1].y, 1.0f);
p3 = vec3(m_circlePoints[m_numDivisions-1].x, m_circlePoints[m_numDivisions-1].y, -1.0f);
// Side 2
n = cross(p4-p3, p1-p3);
m_vertices[m_numVertices] = p1; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(1.0f, 0.0f); m_numVertices++;
m_vertices[m_numVertices] = p3; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(1.0f, 1.0f); m_numVertices++;
m_vertices[m_numVertices] = p4; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(0.0f, 1.0f); m_numVertices++;
n = cross(p1-p2, p4-p2); // value does not change
m_vertices[m_numVertices] = p4; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(0.0f, 1.0f); m_numVertices++;
m_vertices[m_numVertices] = p2; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(0.0f, 0.0f); m_numVertices++;
m_vertices[m_numVertices] = p1; m_normals[m_numVertices] = n; m_textureUV[m_numVertices] = vec2(1.0f, 0.0f); m_numVertices++;
m_edges[m_numEdges++] = p1;
m_edges[m_numEdges++] = p2;
m_edges[m_numEdges++] = p4;
m_edges[m_numEdges++] = p3;
m_edges[m_numEdges++] = p3;
m_edges[m_numEdges++] = p1;
m_cols[1].n = normalize(n);
m_cols[1].n.z = m_cols[1].n.y; m_cols[1].n.y = 0.0f;
m_cols[1].d = dot(m_cols[1].n, p2);
p2 = vec3(m_circlePoints[0].x, m_circlePoints[0].y, 1.0f);
m_cols[2].n = p1;//normalize(cross(p2 - p1, p3 - p1));
m_cols[2].d = dot(m_cols[2].n, p1);
}
}
