C# :: Resize Quadrilateral Image According To New Points

Nov 22, 2014

I have a bit map which I wants to re-size according to new point. But on Paint Event Method getting error not Implemented.

CODE Under Paint Event Method

private void pictureBox3_Paint(object sender, PaintEventArgs e) {
Point[] destinationPoints = {new Point(200, 20),new Point(110, 100),new Point(250, 30), new Point(250, 30) };
Image image = new Bitmap("D:\APP\Resources\MyPic.Png");
// Draw the image mapped to the parallelogram.
e.Graphics.DrawImage(image, destinationPoints);
}

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C :: Resize A Bitmap Image

Aug 22, 2014

I am trying to re-size a bitmap image for a class.They gave us two options to use to do the program with: an array or move the file position indicator. I want to use the file option. All the bitmap header info is checking out. The file after being re-sized should be 822 bytes but it is 1.6 KiB and the image is distorted.

Code:

#include <stdint.h>
/**
* Common Data Types
*
* The data types in this section are essentially aliases for C/C++
* primitive data types.

[Code]...

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Visual C++ :: Program To Resize Image?

Feb 19, 2013

I am currently working on problem set 4 for Harvard's online CS50 course. I am working on a program that resizes a bmp image by a factor of N. N in entered along with an in-file and out-file in a command line argument. The program needs to calculate the header file for the out-file and write it to the out-file. It then needs to actually resize the image and, again, write to the out-file.

The first question I have relates to the header file, here is my code for calculating the header file:

bi2.biHeight = bi.biHeight *n;
bi2.biWidth = bi.biWidth *n;
int padding = (4 -(bi.biWidth * sizeof(RGBTRIPLE))%4)%4;
bi2.biSizeImage = (bi2.biWidth * sizeof(RGBTRIPLE) + padding) * abs(bi2.biHeight);
bf2.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + bi2.biSizeImage;

And here is my code for writing the new header file (bi2 and bf2) to the out-file:

fwrite(&bf2, sizeof(BITMAPFILEHEADER), 1, outptr);
fwrite(&bi2, sizeof(BITMAPINFOHEADER), 1, outptr);

At this point I need to actually resize the image. As far as I can tell there are 2 ways to go about this you either have to use an array to store each line you want to print repeatedly (and then you can just write it repeatedly) OR you have to move the pointer back in the input stream and repeat the read/resize/write process each time you need to print the row.

It is this that I am stuck on, first of all, I am not sure what system would be better for resizing the image, although I am leaning towards using an array, and regardless, I don't even know where to begin when in implementing either.

So what I am asking for is, first of all, just a "double check" to make sure my header code makes sense. And second of all, a push in the right direction for actually resizing the image. Here is my complete code:

/****************************************************************************
* resize.c
*
* Resizes a BMP piece by piece, just because.
***************************************************************************/

#include
#include
#include "bmp.h"
int main(int argc, char* argv[]) {
// ensure proper usage
if (argc != 4) {
printf("Usage: copy N infile outfile

[Code]....

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C/C++ :: Find Maximal Points Among Given N Points

Nov 3, 2014

Example: In a 2-D space, point A=(a1,a2) is bigger than point B=(b1,b2), if a1>b1 and a2>b2.

How do I write a presudo code to find all the maximal points among the given n points?

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C :: Can't Get Array To Resize

Jan 6, 2015

I have an array of blocked users and I want to be able to increase the element size every time a new user is to be blocked.

The blockedUsers array and blockedCount int are global varaibles

Code:
int blockedCount = 0;
char ** blockedUsers; Code: int blockUser(char *username)
{
int i = 0;

[Code]....

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C# :: Compare The Image Of A Button To Another Image In Visual Studio

Jul 3, 2014

Im trying to compare the image of a button to another image in Visual Studio like so...

//variables
Image active = Image.FromFile("C:\Users\Ethan\Desktop\StarWars Status\active.png");
Image stunned = Image.FromFile("C:\Users\Ethan\Desktop\StarWars Status\stunned.png");

[Code]...

btnStatusPlr1.Image SHOULD come back as True.Then I realized it might not be the same as setting the buttons image in the properties (Which is what i did to get the original image (the one being compared to))

I do have a feeling ive done something wrong here (Yes im a noob /> )

Variable active, is the same image as the buttons default (Well should be)

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C++ ::  Dynamic Array Resize Function

Apr 22, 2014

I made a resize function for my dynamic array template class that goes as follows. Note that the private member variables are T* arr, unsigned used, and unsigned cap.

template <class T>
void darray<T>::resize(unsigned size) {
if (size > cap) {
T* temp_arr = new T[size];

[Code] ....

Whenever I use this function to increase the size of the array, it will work the first time I need to use it, but after that, Visual Studios will trigger a breakpoint at line 14, and if I continue past the breaks, I eventually get _CrtIsValidHeapPointer(pUserData) assertion failure.

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C++ :: Vector Syntax - Resize And Reserve

Mar 7, 2014

We can construct vector in following ways

vector<int>v1; //create an empty vector
vector<int>v2(arr,arr+4); ///to create vector from an array
vector<int<v3(v2); //throuh copy constructor

But I have come across some program in a forum,they have create vector like this

vector<int>v(10,5)

I am clueless ,is this allowed?,what syntax allows this?

if a vector is create like this

vector<int>v(3);
v.push_back(1);
v.push_back(2);
v.push_back(3)
v.resize(2);

Now I am curious to know what are the changes those will happen in vector v because of resizing it?

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C++ :: Set Vector Step Length When Resize?

Jan 5, 2013

When I use vectory.push_back(obj), if the length is out of reserved bound, it will deallocate the whole vector and reallocate a big piece of memory. From my understanding I think c++ only allocates 1 more place for the new obj. This is quite inefficient. Is there a way to set the step length whenever the size is out of bound? e.g. 50 more spaces.

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C# :: Keep Aspect Ratio When Resize Form

Dec 15, 2014

When I try to resize my form, every time i try to resize it while running, the window blinks between original size and the new size it was given, when i release the mouse it either stay in its new size or shrinks back to its original size, What makes it return to its original size, maybe its something with the form_Resize function..

private bool inForm_Resize = false;
private Size PrevSize;
private void Form1_Resize(object sender, EventArgs e) {
double dRatio = 1.6;
if (!inForm_Resize) {
inForm_Resize = true;

[Code] ....

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Visual C++ :: CDialog Resize In One Direction

Oct 27, 2014

Is there any way to allow user to resize a CDialog only in one direction ? I mean, by width, but not by height ? How ? I noticed that overriding WM_SIZE, I can do nothing about this issue ...

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C# :: Create GUI Application That Can Resize Also Control Buttons?

May 23, 2012

how can I create a GUI application that can resize also the control buttons. If the user decide to make the windows bigger or smaller I would like my textbox, buttons, etc.. to follow. Like in Java they use a layout manager, but I can't seem to find the answer for c#. I though to use table layout panel, but it doesn't expand when expanding the windows, unless i miss something

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C++ :: Make Resize Function For Matrix2 Class?

Aug 29, 2013

class Matrix1
{
Protected:
int ** data;

[Code].....

// How can we write resize function for Matrix2 class; where this function need to use Protected data members of matrix1 class? Only setters are available in Matrix 1 class but there is no getter function in Matrix1 class !

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C/C++ :: Make Resize Function For Matrix2 Class?

Aug 29, 2013

How can we write resize function for Matrix2 class; where this function need to use Protected data members of matrix1 class? Only setters are available in Matrix 1 class but there is no getter function in Matrix1 class !

class Matrix1 {  
Protected:
int ** data;

[Code]....

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C++ :: Resize Array - No Constructor Could Take The Source Type

Apr 25, 2013

i have 1 class with several class's and 1 structure:

Code:
struct Images {
HBITMAP ImageImage;
BITMAP Imagebm;
HDC ImagehdcMem;
HBITMAP ImageMaskImage;

[Code] .....

But I get these error:
"--------------------Configuration: Sprite2 - Win32 Debug--------------------
Compiling...

Test Sprite2.cpp
C:UsersJoaquimDocumentsVisual C 98Sprite2Test Sprite2.cpp(23) : error C2440: 'type cast' : cannot convert from 'void *' to 'struct Images'
No constructor could take the source type, or constructor overload resolution was ambiguous
Error executing cl.exe.

Sprite2.exe - 1 error(s), 0 warning(s)"

I try search more code, but i get more errors ...

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C :: Dynamic Memory Allocation - Resize Array Of Pointers

May 23, 2013

Suppose I wished to reallocate memory (resize) an array of pointers. Why does the following not work?(The program runs, yet yields a faulty segmentation error message. Why?):

Code: char **ptrarr = (char**) malloc(sizeof(char*))

Code: ptrarr = (char**) realloc(ptrarr, (capacity) * sizeof(char*));

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Visual C++ :: Resize Property Sheet / Page Dialogs

May 17, 2014

any easy way to resize property sheet/page dialogs automatically or semi automatically?. have tried too many stuff, but none were fruitful.

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C++ :: Angle Between Two Points

Apr 19, 2014

i'm working on a robotics project, to move the robot from it's current position to target position i need to calculate the angle first before i can move the robot.this the code I use to calculate the angle:

double cal_angle ( int current_x , int current_y , int tar_x , int tar_y )
{
return atan2(tar_y - current_y, tar_x - current_x);
}
int main ()

[code]....

as u can see the angle between x4,y4 to x1,y1 should be 3.14 (180)however , the result are correct as long as the distance from the current position to target position > 1 (not sure actually).

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C++ :: Distance Between 2 Points Equation

Apr 14, 2013

Write a program that creates the output shown in the Output Layout section below. The program should create 2 points with x and y coordinates as integers, prompt the user to input the x and y values for one of the points and randomly set the other (-99 to 99 range) and output the length of the radius line segment and the area of the circle that radius defines. The program should then end. Include an SDM for the program and any other appropriate documentation.

Special Calculations:
Distance between 2 points equation:
√((p0x – p1x)2 + (p0y – p1y)2) (This requires use of the math library)

Output Layout: (bold text represents user input)

Please enter the location of your first point.
Enter a value from -99 to 99 for your x coordinate: -2
Enter a value from -99 to 99 for your y coordinate: 17

The location of your second randomly set point.
Your x coordinate: 45
Your y coordinate: -89

The length of the radius line segment from point one to point two is 115.
The area of the circle with a radius of 115 is 41546.33.

Other:

int pAx;
int pAy;
int pBx;
int pBy;

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C++ :: Sorting 2D Points Clockwise

Nov 7, 2013

I have 2D points written in {x1, y1, x2, y2, x3, y3, .....}

#include <iostream>
#include <vector>
#include <math.h>
#include <algorithm>
using namespace std;
int main() {
vector<double> vec;
vector<double> vec_ordered;

[Code] .....

Result.

6 4
6 3
6 2
6 1
5 5
5 1
4 4
4 1
3 3
3 1
2 2
2 1
1 1

which wrong result

I wanted to make

6 3
6 2
6 1
5 1
4 1
3 1
2 1
1 1
2 2
3 3
4 4
5 5

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C++ :: Finding Angle From 3 Points

Nov 10, 2013

I am making a game and I am trying to rotate an image so that it is always pointing at the player. I have two lines, the first point of both of them is on the image and the second point of one line is on the last position of the player, and the second point of the other one is on the current position of the player. To rotate the image I need to get the angle between the two lines. how I can get that angle with only the points from the lines?

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C++ :: Calculate Distance Between Two Points

May 15, 2014

It ougth to calculate the distance between two point (p1,p2)

"main.cpp"
#include "distancia.h"
void main () {
Point p1,p2;

[code]....

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C++ :: Memory Points Not Working?

Jul 23, 2013

This is the source code.
--------------------------------------------------------------------------------

#include <iostream>
#include <windows.h>
using namespace std;
int main(){

[Code]....

When I type a word, it gives me the first letter of the word, then a symbol, or nothing.

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C++ :: Closest Distance 2D Points?

Oct 29, 2014

In the following code I don't understand why am I splitting the y left and y right.

(closest distance between 2 points in 2D)

Am I splitting the y left and y right so that I can concatenate them afterwards and then build the strip,only according to these concatenated halves ?

PS : Finding the min. distance between sorted x right and x left works fine , only problem is with the strip.

#ifndef CLOSESTPAIR_H_
#define CLOSESTPAIR_H_
#include <float.h>
#include <math.h>
typedef struct Point2D {
double x;
double y;

[code].....

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C++ :: QuadTree - Should Non-Leaf Nodes Contain Points

Oct 25, 2013

I'm implementing a quad tree for an assignment, and I'm not sure if every node should contain a list of pointers to every Point in its sub tree (implying the root node will contain all Points), or if only leaf nodes should contain the Points.

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C :: Finding Intersection Points Of Two Ellipses

Oct 16, 2014

Today 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

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