I'm following this example on finding the intersection point between a plane and a line. (it's about three quarters down) [URL] .....
However this seems to only show how to solve u.
1. I don't understand what u is.
2. How do I find out the intersection point, in terms of (x, y, z)?
We are supposed to create a point structure that can be used to represent a point in the xy-plane. Then, write a menu-driven C++ program that uses variables of type point to perform a variety of tasks involving points in the xy plane, including slope, distance, midpoint, equation of a line passing through points, and colinearity. One of the functions we are to create is simply for reading in the user-input in the following form "(x,y)" with the user entering the parentheses and comma. We are to create two functions that translate back and forth between this format and what the assignment calls "one point variable."
I'm confused how I'm supposed to take the user entering, say "(1,4)" and reading that into an x and y, and then comparing it against another set of points. I'm guessing I read them in as a, b, c, d, but I'm not sure what this has to do with a structure.
Program which accepts two lines and and determines their intersection point and whether they lie within a circle, also given interactively. I'm racing against time and I've racked my skull to no avail
View 2 Replies View RelatedToday i am going find out solution of two ellipses intersection points using C programming, I solved using geometry equation substitute method but i am not unable to do same thing in C programming.I am talking example as following two ellipses (x^2)/4+y^2=1 , ((x-2)^2)/4+y^2=1
View 11 Replies View RelatedI need updating binary search three. I am working on implementation of Bentley-Ottoman algorithm for finding intersections of line segments in the plane. Code I designed works properly for all, but certain types of triangles. What is happening is that one intersection inside the triangle is never detected due to a fact that segments which intersect in that point never become neighbors in binary search tree.
class segment{
double x1,y1,x2,y2;
int name;
[Code]....
There are numbers of lines connected to each other. I've extracted the line start point and end points but i am confused how to compare the end point of one line with the start point of adjoining line.
View 2 Replies View RelatedA function finds approximate maximum or minimum point of a second degree polynomial function (the point where the derivation will equal to zero ). The input polynomial function will be in the following format:
x2 + bx + c = 0 .
Your C function should take a , b and c as input parameters. Your C function also should take the srch_starting_point and stp_sze from the user. Finally, print the resulting maximum or minimum point (m_x, m_y) and step count (n_step) in your function.
For example, if the input is (a, b, c, srch_starting_point, stp_sze );
1 1 1 -3 1
Output similar to;
Maximum point results ( m_x, m_y, n_step )
-1 1 2
i can find the minimum point at first(Using derivation). After choosing starting point, staating point gets lower step size by step size. I can compare numbers to the minimum number. Afterwards, to find m_y i put m_x in the function. Finally, I put a counter to count steps.
I am trying to find out whether a point is inside a polygon.I am using vector std c++.
My program till now:
Polygon.h
class Polygon {
public:
Polygon();
virtual ~Polygon();
virtual bool Inside(Point p);
[Code] ....
I liked the ray casting algorithm but I dont know how to do in C++.
When I use my perceptron, it classifies everything appropriately, except it always says points that are exactly on the line are above it.
View 9 Replies View RelatedSuppose, I have point_c, line_c and block_c three classes:
class point_c {
public:
double x, y;
};
class line_c {
public:
vector<point_c> Pt;
[Code] ....
As you can see, lines are composed of many points, and blocks are composed of lines and points. And I defined some member functions, so that I can add points or lines as required by line and block.
But, here comes the problem, if I use line.insertPoints(), or block.insertPoints(), the points will be stored in line or block. That is not what I want.
I want have a single place to store all points, a single place to store all lines, and a single place to store all blocks.
Then I guess I need some global variables
vector<point_c> Pt;
vector<line_c> Ln;
vector<block_c> Bk;
And I should change the classes into:
class point_c {
public:
double x, y;
};
class line_c {
public:
vector<size_t> PtIndex;
[Code] .....
in this way, the member functions will create the real entities into the global vector and set an index pointing to that entity. But this approach just make me feel it is not OOP anymore. when people using these classes, they got be careful about the global variables.
I want to create template of of Array in order to have possibility use this template for classes Line and Point.
Code:
// Array.h
// Templated Array class containging Ts
#ifndef Array_H
#define Array_H
template <class T=double> class Array {
[Code] .....
I am having trouble of exactly how "class" works. I dont know what the difference between set and get is. I have this code:
#include <iostream>
#include <cmath>
using namespace std;
class Point {
private:
double px;
double py;
[Code] .....
How to get void Triangle::setBottomLeftX(const double x) to work.
Implement the get and set member functions for the class Triangle. Use the appropriate class attributes of the class Triangle.
a. The location of the bottom left vertex is stored in the member attribute blPoint.
b. The top left vertex can be computed from blPoint and the height.
c. The bottom right vertex can be computed from blPoint and the length.
Code:
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
int main() {
int a[10],b[10],c[10],i,j,k,n,m;
printf ("Enter the size of the first vector: ");
scanf ("%d", &n);
[Code] .....
Now, this is what I've been able to do so far, i know it's very basic but I just started learning programming! I tried different methods found on internet but none of them work for me. I want to find the intersection of arrays a & b then put them in array c(or just display them?)
It involves some discrete mathematics. Any code snippet to get me started?
View 3 Replies View RelatedThe program is to find intersection,union and difference of two sets. The program take the input correctly but after it crashes with the message that some exe is not working...
Code:
#include<iostream>
using namespace std;
void Input(int *A, int*B, int size1, int size2)
//input function {
[Code] ....
I have one code that use MPI broadcast and I want to change it into Asynchronous Point to Point communication. I am newbie in Parallel programming. Looking for implementation of one simple same program in broadcast and P2P ?
View 6 Replies View RelatedHow can a mulitline string be read line by line
ex: str = "PERIOD="week"
DAY="day"
TIME="time"";
I need to write a ANSI program to print out each command line argument on a separate line using a for-loop. also it need to print the name of the executable .so far I have
Code:
#include <stdio.h>
int main(int argc, char **argv) {
int i;
printf("")
[code]....
l need to write a program which writes out its command line arguments in reverse order one per line. The output from the program should look like this:
% a.out Two roads diverged in a yellow wood
wood
yellow
a
in
diverged
roads
Two
I am trying to read a file line by line and then do something with the informations, so my method looks like this:
Code:
void open_file(char *link) {
FILE *file = fopen(link, "r");
if (file == NULL) {
fprintf(stderr, "Could not open file.
");
exit(EXIT_FAILURE);
[Code] ....
1) The first complain of valgrind is at the line where I use fgets and its telling me (invalid write of size x), but I have allocated my line to 56000 and the read line is shorter, why is there a write size error then :S?
2) at the line where I realloc where I try to shrink the space he's telling me: Address .... is 0 bytes inside a block of size 56000, But I know i need only this space so why is there a write over space error :S??
So I'm reading a file line by line and storing it backwards into a list. So if the file has has this format...
1
2
3
4
The code should store each line in a list as such...
4, 3, 2 ,1
Instead the code will store the last variable in all nodes. So the final list will look like this...
4, 4, 4, 4
Here is my code...
struct node *head = NULL;
int i;
while(read(in, &i, sizeof(int)) != 0) {
struct node *temp = malloc(sizeof(*temp));
temp->line = &i;
temp->next = head;
head = temp;
}
I need to read lines from one file and copy them line by line into another file using dynamic memory allocation. It compiles but gives me a seg fault. Why/How?
Code:
int main(){
FILE *fp1;
FILE *fp2;
FILE *i;
fp1=fopen("file1","r");
fp2=fopen("file3","w+");
[Code] ....
I was loaded a bmp file in my mfc window and stored rgb data in a file.My image size is 320x240.
Is possible to pick a single point (location) from that bmp image (Not the whole window)?
i like to plot a line graph using the pointed single line data using the stored file data?
here R is X Axis and G & B is Y Axis.
If i have 2D array of data means how can i plot the line graph?
I'm using fgets which will read a single line at a time, but unlike fgets I don't want it to return the new line char ( ) ?I want to be able to use printf to display the lines next to each other.
View 7 Replies View RelatedI have a text file (test.txt) with the following data:
01,05,25,20130728
01,06,25,20130728
01,07,25,20130728
01,08,25,20130728
01,05,25,20130728
01,05,25,20130728
01,05,45,20130728
01,05,65,20130728
01,05,85,20130728
01,05,35,20130728
01,05,25,20130728
01,05,35,20130728
I want to read this to one string called line. So far I have this code:
string line;
ifstream myfile ("/home/Test.txt");
if (myfile.is_open()) {
while (myfile.good()) {
getline (myfile, line);
for (int a = 0; a <= 335; a++) {
cout <<line.at(a);
} }
myfile.close();
}
so far its only printing the first line and then throwing an instance of 'std::out_of_range'
I need to read a text file which has various lines containing integers. I need to write those integers separately in a vector. Example, the first line of the text file contains 3 9 8 7 6 so vector[4]=3, vector[3]=9, vector[2]=8 and so on. Next read the second line 4 1 2 3 4 5 and write to another vector vector[5]=4, vector[4]=1...
I tried the code below but it will write from the second line, the whole line in one vector index.
int str; // Temp string to
cout << "Read from a file!" << endl;
ifstream fin("functions.txt"); // Open it up!
string line;
// read line count from file; assuming it's the first line
getline( fin, line );
[Code]...
