/**
* Compute the normals for all faces of this mesh object.
* The result is stored in 'FaceNormalList'.
* Assume that 'TriIndices' and 'PositionList' have been populated.
*/
void MeshData::computeFaceNormals()
{
for (unsigned int triIndex = 0; triIndex < TriIndices.size(); triIndex ++)
{
Vec3i tri = TriIndices[triIndex];
tri[0] -= 1;
tri[1] -= 1;
tri[2] -= 1;
Vec3f p1 = PositionList[tri[0]];
Vec3f p2 = PositionList[tri[1]];
Vec3f p3 = PositionList[tri[2]];
float v1[3] = {p1[0] - p3[0], p1[1] - p3[1], p1[2] - p3[2]};
float v2[3] = {p2[0] - p3[0], p2[1] - p3[1], p2[2] - p3[2]};
float result[3];
calculateCrossProduct(v1, v2, result);
FaceNormalList.push_back(result);
}
}
// Draw an individual bone
void Skeleton::drawBoneSegment(bone* root, GLUquadric* q) {
if (root == NULL) {
return;
}
GLfloat a = 0.0;
// Find rotation vector normal.
G308_Point v1 = { 0, 0, 1 };
G308_Point v2 = { root->dirx, root->diry, root->dirz };
G308_Point normal = { 0, 0, 0 };
calculateCrossProduct(v1, v2, &normal);
// Calculate rotation angle from bone's direction vector (degrees).
a = calculateAngleFromDotProduct(v1, v2);
// Draw spheres to represent joints
if (jointsOn == true) {
drawJoints(root);
}
// Rotate local coordinates
glRotatef(root->rotz, 0, 0, 1);
glRotatef(root->roty, 0, 1, 0);
glRotatef(root->rotx, 1, 0, 0);
// Rotate current frame/pose
doCurrentMove(root);
// Rotate local coordinates
glRotatef(-root->rotx, 1, 0, 0);
glRotatef(-root->roty, 0, 1, 0);
glRotatef(-root->rotz, 0, 0, 1);
// Draw axis of each individual joint
if (jointAxisOn == true) {
glPushMatrix();
glRotatef(a, normal.x, normal.y, normal.z);
drawJointAxis(q);
glPopMatrix();
}
glPushMatrix();
glColor3f(1, 1, 1);
// Rotate bone.
glRotatef(a, normal.x, normal.y, normal.z);
// Draw face on the 'head' bone
if (headOn == true && strcmp(root->name, "head") == 0) {
displayFace(root);
}
// Draw the actual bone
gluCylinder(q, 0.3, 0.3, root->length, 3, 3);
// If using second character
// Draw cuboid limbs
if (currentCharacter == 1) {
glScalef(0.2, 0.2, 1);
glTranslatef(0,-2,0);
glTranslatef(0, 0, root->length /2);
// Draw chest
if (strcmp(root->name,"lowerback") == 0 || strcmp(root->name,"upperback") == 0 || strcmp(root->name,"thorax") == 0) {
glPushMatrix();
glScalef(12, 2, 1);
glutSolidCube(root->length);
glPopMatrix();
}
else
glutSolidCube(root->length);
// Draw lower(root) chest
if (strcmp(root->name,"lowerback") == 0) {
glPushMatrix();
glTranslatef(0,0,-root->length);
glScalef(12, 3, 1);
glutSolidCube(root->length);
glPopMatrix();
}
}
glPopMatrix();
// Move bone to correct location
glTranslatef(root->length * root->dirx, root->length * root->diry,
root->length * root->dirz);
}
