Mesh* CreateWireframeBox(float width, float height, float depth, const glm::mat4& transform)
{
float x1 = -0.5f * width;
float x2 = 0.5f * width ;
float y1 = -0.5f * height;
float y2 = 0.5f * height;
float z1 = -0.5f * depth;
float z2 = 0.5f * depth;
VertexPosition verts[] = {
VertexPosition(x1, y1, z1), // 0 (left-bottom-back)
VertexPosition(x1, y1, z2), // 1 (left-bottom-front)
VertexPosition(x1, y2, z1), // 2 (left-top-back)
VertexPosition(x1, y2, z2), // 3 (left-top-front)
VertexPosition(x2, y1, z1), // 4 (right-bottom-back)
VertexPosition(x2, y1, z2), // 5 (right-bottom-front)
VertexPosition(x2, y2, z1), // 6 (right-top-back)
VertexPosition(x2, y2, z2), // 7 (right-top-front)
};
// line segments
unsigned char inds[] = {
// back-to-front
0, 1,
2, 3,
4, 5,
6, 7,
// bottom-to-top
0, 2,
1, 3,
4, 6,
5, 7,
// left-to-right
0, 4,
1, 5,
2, 6,
3, 7,
};
unsigned numVerts = sizeof(verts) / sizeof(verts[0]);
unsigned numInds = sizeof(inds) / sizeof(inds[0]);
// transform the vertices using the user-supplied transformation matrix
TransformPositions(verts, numVerts, transform);
return CreateMesh(GL_LINES, verts, numVerts, inds, numInds);
}
Mesh* CreateFullAxes(float length, const glm::mat4& transform)
{
VertexPositionColor verts[] = {
VertexPositionColor(-length, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f),
VertexPositionColor( length, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f),
VertexPositionColor( 0.0f, -length, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f),
VertexPositionColor( 0.0f, length, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f),
VertexPositionColor( 0.0f, 0.0f, -length, 1.0f, 0.0f, 0.0f, 1.0f),
VertexPositionColor( 0.0f, 0.0f, length, 1.0f, 0.0f, 0.0f, 1.0f),
};
unsigned numVerts = sizeof(verts) / sizeof(verts[0]);
// transform the vertices using the user-supplied transformation matrix
TransformPositions(verts, numVerts, transform);
return CreateMesh(GL_LINES, verts, numVerts);
}
Mesh* CreateWireframePlane(float xSize, float zSize, int xSegments, int zSegments, const glm::mat4& transform)
{
// sanity check
if (xSegments < 1 || zSegments < 1) {
return NULL;
}
float y = 0;
float x = -0.5f * xSize;
float z = -0.5f * zSize;
float x1 = -0.5f * xSize;
float x2 = 0.5f * xSize;
float z1 = -0.5f * zSize;
float z2 = 0.5f * zSize;
float xSpacing = xSize / xSegments;
float zSpacing = zSize / zSegments;
// define world grid mesh data
std::vector<VertexPosition> verts;
// add back-to-front segments
for (int i = 0; i <= xSegments; i++) {
float x = x1 + i * xSpacing;
verts.push_back(VertexPosition(x, y, z1));
verts.push_back(VertexPosition(x, y, z2));
}
// add left-to-right segments
for (int i = 0; i <= zSegments; i++) {
float z = z1 + i * zSpacing;
verts.push_back(VertexPosition(x1, y, z));
verts.push_back(VertexPosition(x2, y, z));
}
// transform the vertices using the user-supplied transformation matrix
TransformPositions(verts, transform);
return CreateMesh(GL_LINES, verts);
}
void TestSoftbody::Tick(const float /*dTime*/)
{
TransformPositions();
}
