C++ :: Sine Wave Movement With The Saucer
May 4, 2014
I am currently working on an arcade game for my final assignment this year. I am struggling to get a sine wave movement with the saucer. Here is the code for it:
void ArcadeGame::spawnSaucer() {
Texture* pTexture = getTexture("saucertexture");
m_pSaucer = new GameObject(pTexture, "saucer");
m_pSaucer -> setPosition(1000, 300);
m_pSaucer -> setVelocity(-1, 10 * sin(1 * 3 * PI / 180), sin(1) * OBJECT_DEFAULT_SPEED);
addGameObject(m_pSaucer);
m_pSaucer->setSolid(true);
}
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Apr 24, 2012
I have the following initial code:
Code:
double objectAngle = -90.0f;
double objectSpeed = 3.0f; // meters per second
double objectDistance = 300.0f;
double objectTime = 0.0f;
double objectHeading = 90.0f;
double elapsedTimePerCycle = 1.0f;
My coordinate system looks like this:
Code:
90 y
|
|
|
+-180 -------------------- 0 x
|
|
|
-90
I want to calculate a new x,y such that it follows a sine wave like pattern until it gets to point (0,0). I want the width of the arc to go out to about -45 degrees, and the same on the other side to about -135 degrees.
How can I compute these new x,y coordinates in C++?
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Mar 7, 2014
I need to create a sinewave. I have the values in an Excel file. The code reads the excel file and prints the values in the cmd but I need it to print back into excel as a sine wave. Pretty sure its currently values for a triangle wave but whatever I want a wave before I care about the type.
Description: Creates an array of values of a triangle wave, prints the result to the screen and creates a CSV (comma separated variable) file of data points. Allows user to enter number of amplitude and number of cycles
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#define N_SAMPLES 1000 // crashes if array size > 1000?
#define UP 1
#define DOWN 0
[Code] ....
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Mar 11, 2013
I'm doing a mixer with wave files. I can play and even apply the reverse effect to them. the logarithm is like this:
for( unsigned int i=0; i<sampleCount/2; i++ )
{
// swapping with the other half
double temp = samples[i];
samples[i] = samples[sampleCount-i-1];
samples[sampleCount-i-1] = temp;
}
Now I want to apply these effects to the files: delay, slow, and fast but I don't know how to do it. The teacher told me that to do it slow I need to double the Samples so I tried to do this samples[i] = samples[sampleCount*2]; it does not work......Also I apply the contrary to do make the sound fast samples[i] = samples[sampleCount/2]; the samething I don't get the sound desired.
For the daley part I'm thinking on play the audio one without touch it and then repit it 8 times or more to create the delay.... I did it like this:
double temp = samples[i];
samples[i] = samples[sampleCount-i-1]+ (samples[sampleCount -i-1]*8);
It didn't work..why the use of -i-1 after sampleCount!!
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May 31, 2012
I have problem with this code:
Code:
#include <string>
#include <fstream>
#include <iostream>
#include <cstdlib>
using namespace std;
// multiplier
const double MULTIPLIER = 0.0000001;
[Code] .....
It should cut wav files into smaller pieces using text file .lab (the values multiplied by * 0.0000001 gives time in second. For example, i have such file with recorded yes and no: [URL] ..... and such boundaries [URL] .... It all should be in the same folder, then, after puting "yesno.wav" into command line and press enter it should gives 2 files with yes and no words. But it doesnt - i obtained one file with silent and one short sound. The record is recorded by Audacity, default sample rate 44100, default sample format 16-bit.
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Aug 17, 2013
i was trying to write a program in c language which can detect mouse movement, but the program which i have written can only detect the mouse click or scroll the program which i have written given below..
Code:
#include<stdio.h>
#include<string.h>
#include <ncurses.h>
int main() {
}
[code]....
run the programme with linked-lncurses. improve my program which also detect when the mouse moves.
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Feb 27, 2013
I want to make history of user's movement. Whenever the user inputs something, and the input is valid, then the input information will be stored into something. And later on, the history shows up whenever I pick the choice.
I have the specific program to make history.
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Mar 7, 2013
I am currently working on quite complex project. Anyway, im not gonna go into deeper details. What I am stuck with is following function.
What I've got so far is basically a picture, and what I am trying to do is to set continuous movement to it, allow the user to control the directions of its movement by pressing "Up" , "Down", "Left " and "Right" key. The best example I can base my idea on is "Snake" game.
I don't have much of a code, however I am willing to upload it upon request.
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Jun 2, 2013
I have built the wave tool and now am trying to run my source code through it. But it just doesn't want to find the include directory. I just don't understand. Here's my command:
#include <stdio.h>
#include <vector>
#include <map>
#include <string>
Perhaps it how I built it since there is no info on how to do this? I just ran ../b2.exe from the boost_1_53_0/tools directory.
I'm running CYGWIN_NT-6.1-WOW64 TARDIS 1.7.18(0.263/5/3) 2013-04-19 10:39 i686 Cygwin with a g++ version of 4.5.3. g++ has no problem finding the default include directory (I don't have to specify the -I switch). The -I switch doesn't seem to work for any of the other include directories that I wan to use either, but I want this cleared up before I get into that since it might be related.
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Feb 7, 2015
I'm making a 2D rpg game, but I have some problem with the sprite movement. The sprite movement feels choppy. That's because I move the sprite 5 pixels per seconds. I now that I need somthing that have to do with SDL_getTicks and deltatime, but I dont know how to use/implement it.
Here is a little part of my code:
float spriteDstY;
float spriteDstX;
float speed = 5;
while(SDL_PollEvent(&event)!= 0) {
if (event.type == SDL_QUIT)
[Code] ....
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Nov 30, 2014
I'm trying to get smooth sprite movement in SDL by using delta time. The way I'm calculating it is
long last = 0;
float deltaTime = 0.0;
...
long now = SDL_GetTicks();
//deltatime is in seconds
if (now > last) {
deltaTime = ((float)(now - last)) / 1000;
last = now;
}
And I'm updating the sprite like this:
virtual void update(float deltaTime) {
float dx = 100*deltaTime;
transform->position.x += dx;
}
But the movement is still noticeably jerky. Also, if I'm correct, my sprite should move 100 pixels to the right every second using this method, so it should take the sprite 8 seconds to reach the end of my window, since it's 800 pixels wide, but it takes it way longer than that. In other words the delta time I'm calculating can't be correct. Am I doing something horribly wrong? I'm guessing it has something to do with rounding, but I'm not sure.
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Mar 4, 2014
I'm trying to implement keyboard controls to move a sphere(Player) with respond to keypress. Currently, when I press any key my character will move to the right by 0.1. How can I move my character with w(up),a(left),s(down),d(right) in their respective directions using respond to keypress?
Code:
class Player {
private:
double x, y;
public:
Player(double a, double b){x=a;y=b;}
void respondtokeypress(char a)
[Code] ....
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Apr 21, 2014
#include <cstdlib>
#include <iostream>
#include <math.h>
#include <cstdio>
#include <stdio.h>
#include "dp_lib.h"
int main() {
int A =1;
[Code]...
im new to coding but ive written this code for an assignment and it creates 2 sine waves and adds them together but i want to be able to create a range of different sine waves at different frequencies and play them one after the other like in my code,but with the end result being that i would like each sine wave to represent a different note, so when your on the the console screen the user will be able to choose from a select number of notes and input them in any order so that the WAV file produced plays the sine waves in the order the user chooses so they can make a simple tune. but my code only plays it in the order it is in the code
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Apr 26, 2013
I am basically trying to make a program for a calculator. I am struggling with how to do the sine calculation. this calculation will take place at line 158.
#include <iostream>
#include <cmath>
using namespace std;
int main() {
double firstNumber = 0.0;
double secondNumber = 0.0;
char operation =' ';
[Code] ....
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Apr 18, 2014
#include <cstdlib>
#include <iostream>
#include <math.h>
#include <cstdio>
#include <stdio.h>
#include "dp_lib.h"
int main() {
int A =1;
float* data;
[Code] ...
I am doing ive written this code that creates 2 sine waves and adds them together but my question is that im trying to write a code where i can create multiple sine waves assign each sine wave to a separate values (musical notes ie A B C) and then be able to add them together in any order to create a tune.
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May 21, 2014
I'm having trouble with getting a sine function to work. All variables are defined earlier in the same section. I have the code in a button (where I figured it would go) but I get the following error:
WindowsFormsApplication2.Math does not contain a definition for 'Sin'
For reference, I am using Microsoft Visual Studio Express 2013, and am coding a Windows Forms Application.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
[Code] ....
I've tried other functions as well (abs, sqrt, etc.) to no avail, as Math only seems to pop up with two options: Equals and ReferenceEquals.
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Dec 22, 2014
Write a C program with a separate function which calculates the sine function from the first principles according to the formula below. The code should find the sine value in 5 stages and then final answer
formula below :
sin(x) = x −x3/3!+x5/5!−x7/7!+x9/9!
I have done the code and it just gives me a final sine wave
it should find a error then plus one so on till it gets the answer
Link:
These are images of what it should look like and the image of a the formula ....
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Jun 3, 2013
I am writing a program to solve a triangle. Given any three pieces of information, find the other three. I am having trouble with SSA. I use the cosine law to find the unknown side. Then I use the sine law to find the other two angles. The sine law will give me each of the other angles. If one of the unknown angles is over 90 degrees, my program gives an angle as under 90 degrees. Not surprisingly, the correct angle and my wrong angle add up to 180 degrees. If you draw out the triangle you can deduce the right answer. How to have my program find out when the angle needs to be over 90 degrees.
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Nov 10, 2012
My assignment is to create a C++ Program to find the sine of a number without any library other than iostream by using Taylor Series:
sin (x) = (x/1!) - (x^3/3!) + (x^5/5!) - (x^7/7!) + (x^9/9!) ...... (x^n/n!).
Here is what i have done till now:
#include <iostream>
double fact (int f); //declaration of factorial function
double power(double x, int y); //declaration of power function
double sin(int x); //declaration of sine function
//double cos(int x); //declaration of cosine function
//double tan(int x); //declaration of tangent function
[code]....
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May 1, 2013
So I'm trying to learn how to use time for time based movement and what not. I did this only knowing the command time(&variable)
time_t timer;
int I, X;
void main() {
time(&timer);
X=timer;
while(I==5) {
[Code] ......
There's probably some other better way to do it... Obviously but for now I see it as putting current time in X.
start while
take in time constantly until I is 5
constantly asking is time>X(preset time 5 seconds ahead)
if it is
display message and add one to I
Why doesn't this display my message after 5 seconds?
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