static inline int findIntersectionInternal(struct OBJ_Model * obj,Face triangle, Vertex p1, Vertex p2, Vector * new_normal, Vector * intersection_point)
{
Vector e1, e2, p, s, q;
Vector bcoords;
float t,u,v, tmp, e=0.000001;
double l, new_normal_length;
Vector v0,v1,v2,dir;
Vector origin, end;
origin.n1 = p1.x;
origin.n2 = p1.y;
origin.n3 = p1.z;
end.n1 = p2.x;
end.n2 = p2.y;
end.n3 = p2.z;
Subtraction(dir,end,origin);
l = VectorLength(dir);
dir.n1/=(float)l;
dir.n2/=(float)l;
dir.n3/=(float)l;
v0.n1 = obj->vertexList[ triangle.v[0]].x;
v0.n2 = obj->vertexList[ triangle.v[0]].y;
v0.n3 = obj->vertexList[ triangle.v[0]].z;
v1.n1 = obj->vertexList[ triangle.v[1]].x;
v1.n2 = obj->vertexList[ triangle.v[1]].y;
v1.n3 = obj->vertexList[ triangle.v[1]].z;
v2.n1 = obj->vertexList[ triangle.v[2]].x;
v2.n2 = obj->vertexList[ triangle.v[2]].y;
v2.n3 = obj->vertexList[ triangle.v[2]].z;
Subtraction(e1, v1, v0);
Subtraction(e2, v2, v0);
CrossProduct(p, dir, e2);
tmp = DotProduct(p, e1);
if (tmp > -e && tmp < e)
return 0;
tmp = 1.0/tmp;
Subtraction(s, origin, v0);
u = tmp * DotProduct(s, p);
if (u<0 || u>1)
return 0;
CrossProduct(q, s, e1);
v = tmp * DotProduct(dir, q);
if (v<0 || v>1)
return 0;
if ( u+v >1)
return 0;
t = tmp * DotProduct(e2, q);
bcoords.n2 = u;
bcoords.n3 = v;
bcoords.n1 = 1 - u - v;
new_normal->n1 = bcoords.n1 * obj->normalList[ triangle.n[0]].n1 +
bcoords.n2 * obj->normalList[ triangle.n[1]].n1 +
bcoords.n3 * obj->normalList[ triangle.n[2]].n1;
new_normal->n2 = bcoords.n1 * obj->normalList[ triangle.n[0]].n2 +
bcoords.n2 * obj->normalList[ triangle.n[1]].n2 +
bcoords.n3 * obj->normalList[ triangle.n[2]].n2;
new_normal->n3 = bcoords.n1 * obj->normalList[ triangle.n[0]].n3 +
bcoords.n2 * obj->normalList[ triangle.n[1]].n3 +
bcoords.n3 * obj->normalList[ triangle.n[2]].n3;
Vector tmpVec = *new_normal;
new_normal_length = VectorLength(tmpVec);
new_normal->n1 /=new_normal_length;
new_normal->n2 /=new_normal_length;
new_normal->n3 /=new_normal_length;
intersection_point->n1 = dir.n1 * t + origin.n1;
intersection_point->n2 = dir.n2 * t + origin.n2;
intersection_point->n3 = dir.n3 * t + origin.n3;
return 1;
}
void main() // main function
{
int menu, result[100], total=0, count=0;
char con;
struct tm time;
_getsystime(&time);
int hr, min, sec;
hr = time.tm_hour;
min = time.tm_min;
sec = time.tm_sec;
int i=0;
do
{
// Menu
system("CLS");
printf("_-_-_-_Menu_-_-_-_\n"
"[1] Multiplication\n"
"[2] Division\n"
"[3] Addition\n"
"[4] Subtraction\n"
"[5] Quit\n\n");
printf("Choose a selection > ");
scanf("%d",&menu);
switch(menu) // switch statement
{
case 1:
{
result[i] = Multiplication(); // function call Multiplication();
output(result[i]); // function call output();
count++; // the times of test
break;
}
case 2:
{
result[i] = Division(); // function call Division();
output(result[i]); // function call output();
count++; // the times of test
break;
}
case 3:
{
result[i] = Addition(); // function call Addition();
output(result[i]); // function call output();
count++; // the times of test
break;
}
case 4:
{
result[i] = Subtraction(); // function call Subtraction();
output(result[i]); // function call output();
count++; // the times of test
break;
}
case 5:
{
Quit(total,count,hr,min,sec); // function call Quit();
break;
}
default:
{
printf("Invalid Input! Please re-enter\n");
main(); // re-run the main function
}
i++;
}
total = total + result[i]; // sum all the tests' marks
// ask for user want to continue the test or not
printf("Do you want to continue? (Y/N) ");
fflush(stdin);
scanf("%c",&con);
toupper(con);
while(con!='Y' && con!='N' && con!='y' && con!='n')
{
printf("Invalid Input! Please re-enter (Y/N)> ");
fflush(stdin);
scanf("%c",&con);
toupper(con);
}
}while(con == 'Y' || con=='y');
Quit(total,count,hr,min,sec); // Print out the total result & Quit the program
}
int main()
{
// Part One:
// FIXME: Declare variables
// Declare two variables: an integer named "age", and a string named "name" with corresponding values (your name and age)
int age = 19;
char name[] = "Stan";
// FIXME: Print
// Print the following sentence in the console "You are NAME and you are AGE years old !". Don't forget to add a newline at the end
printf("You are %s and you are %d years old !\n", name, age);
// FiXME: Concatenation
// Create a new string variable called "hello" which value is "Hello ". Add "name" at the end of "hello" (Concatenation) then print it
char hello[] = "Hello ";
strcat(hello, name);
printf("%s\n", hello);
// FIXME: Array
// create a new string array called "shoppingList", with three elements of your choice. Create an int variable containing the number of
// elements in "shoppingList" (using a function of the array/using the array)
char *shoppingList[3] = {"milk", "a Chevy Camaro", "a life"};
const int nbOfElements = numberOfElements(shoppingList);
// FIXME: For-loop - Integer
// Create a simple for-loop for an integer "i" going from 1 to 10 that print the value of "i"
for (int i = 0; i < 10; i++)
printf("%d ", i);
printf("\n");
// FIXME: For-loop - shoppingList
// Create a for loop that iterate through "shoppingList" and prints each element with "You have to buy (elemt)".
for (int j = 0; j <nbOfElements; j++)
printf("You have to buy %s\n", shoppingList[j]);
// FIXME: Foreach-loop
// Do the same with a foreach-loop.
// The C programming language doesn't have a foreach, but you can look for macros if you are
// curious.
// FIXME: If-statement
// Modify the first for-loop (with i from 1 to 10) such that it prints "(value of i) is even" when "i" is divisible
// by 2 (You may want to learn more about "modulo" (%)). Else, print "(value of i) is odd".
for (int i = 0; i < 10; i++)
{
if (i % 2)
printf("%d is odd\n", i);
else
printf("%d is even\n", i);
}
// FIXME: Sum Up
// Create a string variable called "element" with the value of your choice. Then create a for-loop/foreach-loop that checks if "shoppingList"
// contains "element". If yes, print "You have to buy (value of element) !", and stop the loop (search how to stop a loop).
// If not, print "Nope, you don't need (value of "element")".
char element[] = "a life";
for (int k = 0; k < nbOfElements; k++)
{
if (strcmp(element, shoppingList[k]) == 0)
{
printf("You have to buy %s !\n", shoppingList[k]);
break;
}
else
{
printf("Nope, you don't need %s !\n", shoppingList[k]);
}
}
// Part Two:
// FIXME: Functions - Ascii
// Create a function that returns nothing and which doesn't takes any parameter. It should just be named "TriForce"
// and print the TriForce symbol (one triangle over two other ones, can be found on internet) with "TRIFORCE"
// Don't forget to call the function !
TriForce(); //Calling the functions in main()
// FIXME: Functions - One parameter
// Create a function that takes a string as parameter and returns "Hello (value of string) !"
// http://stackoverflow.com/questions/1745726/how-to-store-printf-into-a-variable
printf("%s", Hello("Stan"));
// FIXME: Functions - Multiple parameters
// Create a function that takes two integers as parameters and returns the addition of these two.
// You can do the same with multiplication, subtraction and division.
printf("%d\n", Addition(5, 12));
printf("%d\n", Subtraction(5, 12));
printf("%d\n", Multiplication(5, 12));
printf("%d\n", Division(5, 12)); // returns 0 because "a" and "b" are Integers
printf("%d\n", Division(10, 2));
// FIXME: User entry
// Create a string variable that takes what the user enter in the console as value. Then print "You entered (value of string)"
char userInput[100]; // 100 will be the max length of the input
printf("Enter a word:");
scanf("%s", userInput);
printf("You entered %s\n", userInput);
// FIXME: While loop
// Create a while loop that takes a number and divides it by 2 until it is less than 3
int number = 52;
while (number > 3)
{
number /= 2; //or number = number / 2;
printf("%d ", number);
}
printf("\n");
// FIXME: do-While loop
// Do the same with a do-while loop
int number2 = 84;
do
{
number2 = number2 / 2;
printf("%d ", number2);
} while (number2 > 3);
printf("\n");
// FIXME: Random generator
// Create a function that returns a random number
srand((unsigned)time(NULL)); // time used for seeding
printf("%d\n", rdm());
// FIXME: Random generator with bounds
// Create another function that returns a random number between two bounds given as parameters.
printf("%d\n", rdmBounds(10, 20));
// FIXME: Multi-dimensionnal array
// Create a two dimensionnal int array of 3 columns and 3 rows. Use 2 for-loops to add a random number
// between 1 and 9 in each of the 9 rooms.
// You may use one of the two previously created function.
// Then print them such that they appear like this (with [x1, x9] being the 9 random integers):
// {x1, x2, x3, }
// {x4, x5, x6, }
// {x7, x8, x9, }
int multiArray[3][3];
for (int l = 0; l < numberOfElements(multiArray); l++)
for (int m = 0; m < numberOfElements(multiArray[l]); m++)
multiArray[l][m] = rdmBounds(1, 9);
for (int n = 0; n < numberOfElements(multiArray); n++)
{
printf("{");
for (int o = 0; o < numberOfElements(multiArray[n]); o++)
printf("%d, ", multiArray[n][o]);
printf("}\n");
}
// FIXME: Switch
// Create a Switch that takes an integer "a" and return a sentence regarding the value of a
// (Create 3 statements for 3 specific values and a default one)
int a = 2;
switch(a)
{
case 0:
printf("a is 0\n");
break;
case 2:
printf("a is 2\n");
break;
case 37:
printf("Who cares about a anyway ?");
break;
default:
printf("I don't know what \"a\" is... :'(\n");
break;
}
// FIXME: logic Gates
// Create 7 functions for each logic gates (And (0), Or (1), No (2), Nand (3), Nor (4), Xnor (5), Xor (6)).
// Each function takes two booleans as parameters and returns the result of the logic gate.
// (or You can do it with a switch and only one function)
logic_gates(1, 0, 1);
logic_gates(1, 1, 1);
logic_gates(1, 2, 1);
// FIXME - Reverse
// Create a function that reverse a string
reverse("Hello world");
return 0;
}
