//this function generates a fixed tube
static spScene generate_simple_tube(ISimplygonSDK sdk)
{
const int vertex_count = 16;
const int triangle_count = 24;
const int corner_count = triangle_count * 3;
//create a scene object
spScene scene = sdk.CreateScene();
// triangles x 3 indices ( or 3 corners )
int[] corner_ids = { 0, 1, 4,
4, 1, 5,
5, 1, 6,
1, 2, 6,
6, 2, 3,
6, 3, 7,
7, 3, 0,
7, 0, 4,
4, 5, 8,
8, 5, 9,
9, 5, 10,
5, 6, 10,
10, 6, 7,
10, 7, 11,
11, 7, 4,
11, 4, 8,
8, 9, 12,
12, 9, 13,
13, 9, 14,
9, 10, 14,
14, 10, 11,
14, 11, 15,
15, 11, 8,
15, 8, 12 };
// vertices with values for the x, y and z coordinates.
float[] vertex_coordinates = { 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, -1.0f,
-1.0f, 0.0f, -1.0f,
-1.0f, 0.0f, 1.0f,
1.0f, 15.0f, 1.0f,
1.0f, 15.0f, -1.0f,
-1.0f, 15.0f, -1.0f,
-1.0f, 15.0f, 1.0f,
1.0f, 20.0f, 1.0f,
1.0f, 20.0f, -1.0f,
-1.0f, 20.0f, -1.0f,
-1.0f, 20.0f, 1.0f,
1.0f, 35.0f, 1.0f,
1.0f, 35.0f, -1.0f,
-1.0f, 35.0f, -1.0f,
-1.0f, 35.0f, 1.0f };
spGeometryData geom = sdk.CreateGeometryData();
//add bone weights and ids to geometry data (per vertex)
geom.AddBoneWeights(2);
spRealArray coords = geom.GetCoords();
spRidArray vertex_ids = geom.GetVertexIds();
spRealArray BoneWeights = geom.GetBoneWeights();
spRidArray BoneIds = geom.GetBoneIds();
geom.SetVertexCount(vertex_count);
geom.SetTriangleCount(triangle_count);
//create the bone table
spSceneBoneTable scn_bone_table = scene.GetBoneTable();
//create an array to store bone ids
spRidArray bone_ids = sdk.CreateRidArray();
//create root bone for the scene
spSceneBone root_bone = sdk.CreateSceneBone();
root_bone.SetName("root_bone");
//add the bone to the scene bone table and get a bone id
int root_bone_id = scn_bone_table.AddBone(root_bone);
//a
bone_ids.AddItem(root_bone_id);
spSceneBone parent_bone = root_bone;
//create bones and populate the scene bone table
for (uint bone_index = 1; bone_index < total_bone; bone_index++)
{
spSceneBone bone = sdk.CreateSceneBone();
bone.SetName("ChildBone");
spTransform3 boneTransform = sdk.CreateTransform3();
//SET UP BONE IN BIND POSE
//translate the child bone to its corrent position relative to the parent bone
boneTransform.AddTransformation(bone.GetRelativeTransform());
boneTransform.PreMultiply();
boneTransform.AddTranslation(0.0f, 17.5f, 0.0f);
//store the relatvice transform
bone.GetRelativeTransform().DeepCopy(boneTransform.GetMatrix());
//add bone to the scene bone table
int bone_id = scn_bone_table.AddBone(bone);
//link bone to parent bone
parent_bone.AddChild(bone);
bone_ids.AddItem(bone_id);
parent_bone = bone;
}
float[] v = new float[3];
for (int i = 0; i < vertex_count; ++i)
{
v[0] = vertex_coordinates[i * 3];
v[1] = vertex_coordinates[i * 3 + 1];
v[2] = vertex_coordinates[i * 3 + 2];
coords.SetTuple(i, v);
//real blend_val = real((rid(i)/rid(4)))/real(3);
float blend_val = 0.5f;
float blend1 = 1.0f - blend_val;
float blend2 = blend_val;
int bone_id_1 = 0;
int bone_id_2 = 1;
if (i < 4)
{
bone_id_2 = -1;
blend2 = 0;
blend1 = 1;
}
else if (i > 11)
{
bone_id_1 = -1;
blend2 = 1;
blend1 = 0;
}
blend1 *= blend1;
blend2 *= blend2;
//set the bone weights to perform skining
BoneWeights.SetItem((i * 2) + 0, blend1);
BoneWeights.SetItem((i * 2) + 1, blend2);
//set the bone ids influencing the vertex.
BoneIds.SetItem((i * 2) + 0, bone_id_1);
BoneIds.SetItem((i * 2) + 1, bone_id_2);
}
for (int i = 0; i < corner_count; ++i)
{
vertex_ids.SetItem(i, corner_ids[i]);
}
//create a scene mesh
spSceneMesh mesh = sdk.CreateSceneMesh();
mesh.SetGeometry(geom);
mesh.SetName("mesh");
//get the root node of the scene and add the root_bone and mesh to the scene
scene.GetRootNode().AddChild(mesh);
scene.GetRootNode().AddChild(root_bone);
return(scene);
}
