I am using the following code to print in SDL screen
SDL_GL_RenderText( timer, font, color, &position);
sprintf(timer," Time : %d",time);
to print in SDL screen(used with opengl) , i am doing project on C++, as "sprintf" is C style function , so i can't do like this , i am trying to use" ostringstream" , but i am not sure how to use it.
#include <stdio.h>
float total, avg, max, min;
float judge[4];
int index;
int array[4];
int main() {
total = 0.0;
max = array[0];
min = array[0];
[Code] ....
I dont understand how to make the array when it prints out only print out the final average and the final maximum score with the final minimum score but what its doing at the moment is just giving an average for each individual score taken...
Minimum and maximum scores are displaying 0.0
And it displays these things 4 times in a row i just want it to be displayed once.
Using the array to accept 10 testscore. Calculate and print the highest, lowest, fifth test score entered and all the test score entered in reverse order.
How i would get it to print the highest,and lowest and in reverse order. I'm confused as to what to do...
I have a class called Point that has functions for getting and setting x, y, and z coords., distance, and midpoint. I need to write a function that prints the class and must use ostream & displayPoint( ostream & ); as the prototype. I did some googling and came up with
std::ostream& Point::displayPoint(std::ostream& out)
{
out << "(" << out.getx() << ", " << out.gety() << ", " << out.getz();
return out;
}
in order to print (x, y, z).
My IDE (Xcode) says "No member named 'getx' in std::__1::basic_ostream<char>"
I don't understand much about ostream reference
I'm trying to overload an operator << so that it prints to a .txt file. Would these two codes basically do the same thing? If so, which one is the more efficient one to use?
ofstream& operator<<(ofstream& fout, const Grid& g);
ostream& operator<<(ostream & out, const Grid& g);
I have been trying to figure this out for a text based game. Lets say your money is 500. Then you save your game, but when you start the game the starting is 50, so when you load it, you still have 500 money, I tried lots of test, and im having trouble?
View 10 Replies View RelatedI'm using cout to print lots of lines. But i want to put together them in one variable etc. Then , i want to print it. I think i can do it with ostream but I cant do it . Is there any example use of ostream.
I want to use it such that:
x<< "hello" << endl;
x<< "mike" << endl;
x<< "how " << endl;
x<< "are" << endl;
x<< "you" << endl;
cout << x;
Will print
hello
mike
how
are
you
How can i do it?
How I can make 2D games in OpenGL. I have sprites, but when I load them in game, they're all big and stuff, not pixel for pixel how I'd like them. How can I do this?
View 16 Replies View RelatedI am because I don't know what to use OpenGL or DirectX? I heard some people saying I can use both. How is this? What is better for online games? And when I choose I will need some tutorials too ....
View 1 Replies View RelatedThis is my first time using opengl and I am experimenting with adding/drawing polygons/points/etc. on top of a PPM image. The image is already loaded when the application runs. My attempt to draw a square is from lines 30 - 35. The program runs but the square is not present. Just the image.
#include<windows.h>
#include <stdio.h>
#include <stdlib.h>
#include<Gl/gl.h>
#include<GL/glut.h>
int n;
int m;
int *image;
[Code] ....
i want to draw a 3D snake in opengl.. i can't get nothing out of my search to make a start.. how it is made
View 4 Replies View RelatedI've read up on .bmp files on wikipedia and am currently attempting to make a function that can export a .bmp file of the screen of my programs. I've already begun work on it but it isn't working. The code I have so far is:
typedef char Byte;
typedef int Byte4;
typedef short Byte2;
struct BMP_Header {
[Code] ....
My problems are that when less then the required amount of bytes is needed to store a value in the file, the 00 bytes are skipped (Ex. The file will contain 42 instead of 42 00 00 00), and the Pixels are stored as nothing but 0D ( every value intended for storing pixel data is 0D ).
I don't know why, but textures in OpenGL are white. One day, I must've change something, and now my textures wont load properly. I tried rewriting my code that loads things multiple times, my textures still are white. Here is my code:
(I switched back to the FF pipeline temporarily, in my other projects I use shaders.)
Sprite.hpp
#include <SDL.h>
#include <SDL_opengl.h>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>
#ifndef _SPRITE_H_
#define _SPRITE_H_
[Code] ....
Where can I learn how to make fractals with opengl?
View 1 Replies View RelatedI'm printing characters on a texture map using OpenGL and GLUT with C++. The problem is that when they appear on the map the x-coordinates are correct but the y-coordinates are upside down. The coordinates are being read from an input file and are in the form x,y with a semicolon separating each xy pair. I tried putting a negative sign in front of the y-coordinates to see if that would force the characters to go in the right place but that just made minus signs appear on the screen. Is there a function in OpenGL/GLUT that can invert coordinates by a certain value?
View 12 Replies View RelatedI want to do something like when you have completed the first question then the program will give you +3 in coins then you have completed next question then I want the program to add 3 more so it says you have a value of coins 6. But I do not know exactly how to do this the code I begun to write was this:
Code:
#include <iostream>
using namespace std;
int main()
[Code] ...
This code works for 1 question but I want it to work like add 3 for every question the user guesses correct. Like if user enters the correct answer 3 times then he/she has a value of coins 9.
Currently in development of a cookie clicker clone (for fun)
I am stuck at the idea of the "Cookies Per Second" thing.
Is there a way to implement a per second adder thing that doesnt actually effect the game play (eg even though the player may not be pressing C every second a cookie (or more) will be added, or if they can press C more than once a second, every second a cookie will be added... If you get what I mean).
Code is below if you would like to look />
MAIN.cpp
#include <iostream>
#include <conio.h>
#include <Windows.h>
#include "Shop.h"
#include "Varis mate.h"
[Code] .....
If I wanted to design an object in SolidWorks, and then output that object (I guess as a .stl file), is it possible to open that up and manipulate using openGL? How would I go about doing that?
View 1 Replies View RelatedHow can i convert pixel to [-1..1]coordinate in opengl? Which function? I want to write a program that is work with
glutmousefunc(),
When I click on the screen a ball is appear on it where clicked. but mouse work with pixel and circle work with coordinate between -1 and 1 ....
I am trying to compile an OpenGL program in Ubuntu.This program opens a blank window.
Code:
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <cstdio>
#include <iostream>
int main(int argc,char* argv[])
[code]....
What i'm trying to do is create a 3d game engine with opengl and i want to be multi platform. I'm trying to use code-blocks for this reason but i'm having trouble setting up opengl for code-blocks
View 1 Replies View RelatedI recently made a heightmap, it uses a triangle strip /row, and I try to figure out how can i color the triangles one by one. So, for example I have a color array of 9:
[0.0f,0.2f,0.6f //a triangles first vertex
0.0f,0.4f,0.3f //second vertex
0.0f,0.7f,0.2f] //third vertex
And I want to use it to color all triangles with it. My heightmap coords are in a vector:
vector<GLfloat> hmapcrds [x1,h1,z1; x2,h2,z2;...]
Like this:
c1 c2 c3 c4 c5 //row 1
c6 c7 c8 c9 c10 //row 2 coordinates
index array:c6->c1->c7->c2 ...cn->c(n-rwosize)->c(n+1)->cn->c(n-rwosize+1)
I draw my elements with a VAO and drawelements/row; (i tried drawrange but didnt work)
...
glGenVertexArrays(1,&VertArrObj);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,sizeof(GLuint)*v_heightIndexes.sie(),&v_heightIndexes[0],GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER,vertexBuffer);
[Code] ....
I think it want to index my color array too, so how can i do that it only reads the 3 colors from my array, the repeat it /vertex/triangle till the end of drawing.
The shaders work fine, i changed the map to a triangle so it applied these colors, but with the map "I see only darkness before me".
with my working shader without color "in" - height coloring: [URL] ....
(I also want to do texturing per triangle.)
So I did read, however it said also that it was memory intensive and I had a question... I also came across this:
Window.pushGLStates();
Window.draw("Sfml Text");
Window.popGLStates();
The problem here is that none of these commands exist!
Window.draw should exist and even though I have all the proper includes I still get it telling me that 'Draw' is not a member of sf::Window
I have encountered that error many times everywhere across my sfml related code, it's not like they removed all those features in the update (Which they did not) but, why then would it not be a member?
I am supposed to create a class of rectangular prism in opengl. I am having touble in writing my "draw()" function.
I have searched the web, and lots of the sites have:
glBegin(GL_Quads);
glVertex3f(x,y,z);
glVertex3f(...);
glVertex3f(...);
glVertex3f(...);
3D coordinates for each face.
For my code, I am getting a value for lengths of x, y and z like "getXlength(x_length)" etc... I would like to know how I can use these values to draw the prism rather than giving values for each coordinates in each face.
I am using SFML CodeBlocks and OpenGL i am not very good in OGL ...
i want 2 know how to make a simple 3d Cube with OGL ...
I wrote a program in C + + and OpenGL using MinGW, which displays a map in 2D.
The following is a function that does the fault occur, ie when executes the statement gluTessEndPolygon (tobj) gives me segmentation fault:
// render each block as a polygon extruded into Z
void BlockGroup::BuildDisplayList() {
static GLUtesselator *tobj = NULL;
if( ! mod.world->IsGUI() )
[code]....
contours is a list of vectors of the following type:
std::vector<std::vector<GLdouble> > contours;
I report also:
#define VAR(V, init) __typeof(init) V=(init)
#define FOR_EACH(I,C) for(VAR(I, (C).begin()), ite = (C).end(); (I) != ite;
++(I))
I tried to use the debug and have come to the message of Segmentation Fault on education above. Now I do not know what to do.