My first animation project

Doing higher studies in computer science can sometimes be real fun and also at times be a real pain in the butt. Computer animation sounded like an interesting course to me and I decided to give it a shot. It was about coding in vc++ using openGL libraries. The good side of the course: Got to learn a lot of things, fun times :)

Bad side: The projects at times take a toll on you.

Our first project was to read a .skel file which contains the coordinates of a certain figure and to render that figure.

You can find the complete question here.

Well, to make things a little simple for some of you guys who might consider taking this course I have placed a sample code snippet below. (P.S: Do not try re-using the same code as it will not work ;) )

void Generate_Tree()

{

char *string213;

int length = 0;

char temp[500], temp1[500], temp2[500];

int j=0, counter =0, counter_temp = 0;

ifstream pointer;

fflush(stdin);

pointer.open("dragon.skel");

if(pointer == NULL)

{

cout<<"File not there\n";

cout<<"Press any key to exit: ";

getch();

exit(1);

}

root->Left = NULL;

root->Right = NULL;

root->Center = NULL;

node = root;

do

{

pointer.getline(temp, MaxLine);

//cout<<

length = strlen(temp);

//cout<<

if(temp[length-2] == '{')

{

// cout<<"After entering the loop: "<

Tree_Node *child = new Tree_Node;

child->nodeNum = number+1;

child->pose[0] = 0;

child->pose[1] = 0;

child->pose[2] = 0;

memset(&child->rotateX,0,sizeof(double)*2);

memset(&child->rotateY,0,sizeof(double)*2);

memset(&child->rotateZ,0,sizeof(double)*2);

if(node->Left == NULL)

{

// cout << "left created"<

node->Left = child;

}

else if(node->Center == NULL)

{

//cout << "center created"<

node->Center = child;

}

else

{

//cout << "right created"<

node->Right = child;

}

child->Left = NULL;

child->Right = NULL;

child->Center = NULL;

child->Prev = node;

node = child;

counter++;

}

else if(temp[length-2] == '}')

{

// cout << "go back " <

node = node->Prev;

counter--;

}

else if(temp[length-2] == ' ')

{

continue;

}

else

{

j = 0;

for(int r = 0;r

{

if(temp[r] != 9)

{

temp2[j] = temp[r];

j++;

}

}

temp2[j] = '\0';

{

string213 = strtok(temp2," ");

//cout<<<"\n";

strcpy(temp1,string213);

if(strcmp(temp1,"offset") == 0)

{

node->offset[0] = atof(strtok(NULL," "));

node->offset[1] = atof(strtok(NULL," "));

node->offset[2] = atof(strtok(NULL," "));

cout<offset[0]<offset[1]<offset[2]<<"\n";

}

else if(strcmp(string213,"boxmin") == 0)

{

node->boxmin[0] = atof(strtok(NULL," "));

node->boxmin[1] = atof(strtok(NULL," "));

node->boxmin[2] = atof(strtok(NULL," "));

//cout<boxmin[0]<<" "<boxmin[1]<<" "<boxmin[2]<<"\n";

}

else if(strcmp(string213,"boxmax") == 0)

{

node->boxmax[0] = atof(strtok(NULL," "));

node->boxmax[1] = atof(strtok(NULL," "));

node->boxmax[2] = atof(strtok(NULL," "));

//cout<boxmax[0]<boxmax[1]<boxmax[2]<<"\n";

}

else if(strcmp(string213,"rotxlimit") == 0)

{

node->rotateX[0] = atof(strtok(NULL," "));

node->rotateX[1] = atof(strtok(NULL," "));

//cout<rotateX[0]<rotateX[1]<<"\n";

}

else if(strcmp(string213,"rotylimit") == 0)

{

node->rotateY[0] = atof(strtok(NULL," "));

node->rotateY[1] = atof(strtok(NULL," "));

}

else if(strcmp(string213,"rotzlimit") == 0)

{

node->rotateZ[0] = atof(strtok(NULL," "));

node->rotateZ[1] = atof(strtok(NULL," "));

}

else if(strcmp(string213,"pose") == 0)

{

node->pose[0] = atof(strtok(NULL," "));

node->pose[1] = atof(strtok(NULL," "));

node->pose[2] = atof(strtok(NULL," "));

}

}

}

//cout<<

}while(counter != 0);

pointer.close();

}

void Read_Tree()

{

int tempNO=0;

int Copy_Flag = 0;

int Visited = 0;

/*root->Left->FlagL = 0;

root->Left->FlagC = 0;

root->Left->FlagR = 0;*/

node = root->Left;

//cout<<"Enter Read Tree"<<"\n";

Queue[front] = node;

rear++;

do

{

node=Queue[front];

//cout<offset[0]<<" "<offset[1]<<" "<offset[2]<

glMatrixMode( GL_MODELVIEW );

glPushMatrix();

glLoadIdentity();

glTranslatef(node->offset[0], node->offset[1], node->offset[2]);

if(node->pose[0] <>rotateX[0])

node->pose[0] = node->rotateX[0];

if(node->pose[0] > node->rotateX[1])

node->pose[0] = node->rotateX[1];

if(node->pose[1] <>rotateY[0])

node->pose[1] = node->rotateY[0];

if(node->pose[1] > node->rotateY[1])

node->pose[1] = node->rotateY[1];

if(node->pose[2] <>rotateZ[0])

node->pose[2] = node->rotateZ[0];

if(node->pose[2] > node->rotateZ[1])

node->pose[2] = node->rotateZ[1];

//cout<pose[0]<<" "<pose[1]<<" "<pose[2]<

glRotatef(57.3 * node->pose[0], 1.0, 0.0, 0.0);

glRotatef(57.3 * node->pose[1], 0.0, 1.0, 0.0);

glRotatef(57.3 * node->pose[2], 0.0, 0.0, 1.0);

glGetDoublev(GL_MODELVIEW_MATRIX,node->local);

/*cout<<"Current Local";

for(int d = 0;d<=15;d++)

{

cout<local[d]<<" ";

}*/

//cout<

if(node->Prev == root)

{

//cout<<"I am root \n";

glMatrixMode(GL_MODELVIEW );

glPushMatrix();

glLoadIdentity();

glGetDoublev(GL_MODELVIEW_MATRIX,node->world);

}

else

{

//cout<<"I am NOT root \n";

getWorldMatrix(node->Prev->world, node->local, node->world);

/*cout<<"Current World";

for(int d = 1;d<=16;d++)

{

cout<world[d]<<" ";

}*/

}

if(node->Left != NULL)

{

//cout<<"IF condition1"<

tempNO = node->Left->nodeNum;

Insert_Queue(node->Left);

}

if(node->Center != NULL)

{

//cout<<"IF condition2"<

tempNO = node->Center->nodeNum;

Insert_Queue(node->Center);

}

if(node->Right != NULL)

{

//cout<<"IF condition3"<

tempNO = node->Right->nodeNum;

Insert_Queue(node->Right);

}

front++;

//cout<<"Front: "<<<">

}while(front != rear);

}

As you can see I was dumb enough not to use the generic creation of a tree which made my work hell. Anyways, good luck!!

Will be happy to answer queries.