I'm trying to assign some default values to a structure elements.
My structure is as follows:
struct SourceProperties
{
SoundTypes m_SoundTypes;
ChannelGroupType m_channelGroupType;
SoundTrigger m_SoundTrigger;
QE::CVector m_SourcePosition;
QE::CVector m_SourceVelocity;
QE::CVector m_Up;
QE::CVector m_Forward;
QE::CMatrix m_SourceOrientation;
float m_SourceIntensity;
QE::CVector m_SoundFactors;
};
CVector and CMatrix are defined classes in our own engine and SoundTypes, ChannelGroupType and SoundTrigger are of "enum" type.
I need to define the default values of the element values in the constructure of another class. To be more clear, the user sets the values of the elements of this structure, using the instance of this structure in another class. Here is a pSeudo code:
The class where the structure is defined (header file):
class CSound
{
public:
struct SourceProperties
{
SoundTypes m_SoundTypes;
ChannelGroupType m_channelGroupType;
SoundTrigger m_SoundTrigger;
QE::CVector m_SourcePosition;
QE::CVector m_SourceVelocity;
QE::CVector m_Up;
QE::CVector m_Forward;
QE::CMatrix m_SourceOrientation;
float m_SourceIntensity;
QE::CVector m_SoundFactors;
};
private:
SourceProperties m_SourceProperties;
};
The class in which we assign the default values (header and cpp file):
class CSoundComponent :
{
private:
CSound::SourceProperties m_SoundProperties;
}
The cpp file:
QE::CSoundComponent()
{
m_SoundProperties.m_SoundTypes = CSound::SoundTypes::ST_3D;
m_SoundProperties.m_SoundTrigger =CSound::SoundTrigger::STR_EVENT;
m_SoundProperties.m_Forward = CVector(1.0f,0.0f,0.0f);
m_SoundProperties.m_Up = CVector(0.0f, 1.0f, 0.0f);
m_SoundProperties.m_SourcePosition = CVector(0.0f, 0.0f, 0.0f);
m_SoundProperties.m_channelGroupType=CFMODChannelGroup::ChannelGroupType::CGP_DEFAULT;
m_SoundProperties.m_SourceIntensity = 10000.0f;
m_SoundProperties.m_SoundFactors = CVector(1.0f, 1.0f, 1.0f);
oid QE::CSoundComponent::SetSoundProperties(QE::CSound::SourceProperties pSourceProperties)
{
m_SoundProperties.m_SoundTypes = pSourceProperties.m_SoundTypes;
m_SoundProperties.m_channelGroupType = pSourceProperties.m_channelGroupType;
m_SoundProperties.m_SoundTrigger = pSourceProperties.m_SoundTrigger;
m_SoundProperties.m_SourcePosition = pSourceProperties.m_SourcePosition;
m_SoundProperties.m_SourceIntensity = pSourceProperties.m_SourceIntensity;
m_SoundProperties.m_SoundFactors = pSourceProperties.m_SoundFactors;
}
}
The class which user is utilizing(cpp):
class userclass
{
CSound::SourceProperties lSoundProperties;
lSoundProperties.m_SoundTypes = CSound::SoundTypes::ST_3D;
QE::CSoundComponent* lSoundComponent;
lSoundComponent->setSoundProperties(lSoundProperties);
}
for some reason all the values that the user is assigining is are set properly, all the default values are also set except for the float value.
Does anyone have any idea how I should define the assignment operator "="? Thank you.
Related
When I input a digit in the JTextfields it should pass through my actionListener to store all the values (ID, number of sides, length of sides and color) into an arraylist. It should then be used in my polygonContainer class that goes through a for loop and a polygon formula, then prints it out. However what comes out all the time is a straight line.
This is the code i tried:
import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
public class ContainerFrame extends JFrame{
ArrayList<PolygonContainer> polygons = new ArrayList<>();
// JTextFields for the number of sides, side length, color, and ID
public JTextField pSides, pSidesLengths, pColor, pID;
// Button for submission
public JButton submitButton;
public void createComponents() {
// Initialize the JTextFields
pSides = new JTextField();
pSidesLengths = new JTextField();
pColor = new JTextField();
pID = new JTextField();
submitButton = new JButton("Submit");
submitButton.addActionListener(new ContainerButtonHandler(this));
JPanel textFieldsPanel = new JPanel();
// uses a gridlayout to organise the textfields then sets it as north
textFieldsPanel.setLayout(new GridLayout(5, 2));
textFieldsPanel.add(new JLabel("Sides:"));
textFieldsPanel.add(pSides);
textFieldsPanel.add(new JLabel("Sides Length:"));
textFieldsPanel.add(pSidesLengths);
textFieldsPanel.add(new JLabel("Color:"));
textFieldsPanel.add(pColor);
textFieldsPanel.add(new JLabel("ID:"));
textFieldsPanel.add(pID);
add(textFieldsPanel, BorderLayout.NORTH);
add(submitButton, BorderLayout.SOUTH);
JPanel drawPanel = new ContainerPanel(this);
add(drawPanel, BorderLayout.CENTER);
setSize(1600, 900);
setVisible(true);
setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); // Close action.
}
public static void main(String[] args) {
ContainerFrame cFrame = new ContainerFrame();
cFrame.createComponents();
}
}
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
class ContainerButtonHandler implements ActionListener {
ContainerFrame theApp; // Reference to ContainerFrame object
// ButtonHandler constructor
ContainerButtonHandler(ContainerFrame app) {
theApp = app;
}
public void actionPerformed(ActionEvent e) {
// Get the text from the JTextFields using the getText method
String sides = theApp.pSides.getText();
String sidesLengths = theApp.pSidesLengths.getText();
String id = theApp.pID.getText();
//parse the values as integers
int intSides = Integer.parseInt(sides);
int intSidesLength = Integer.parseInt(sidesLengths);
int intId = Integer.parseInt(id);
//does the input validation where sides, sides length and id needs to be positive integers
if (intId >= 100000 && intId <= 999999 && intSides >= 0 && intSidesLength >= 0) {
// The inputs are valid
String color = theApp.pColor.getText();
// Store the values in an arraylist or other data structure
ArrayList<String> polygonArray = new ArrayList<String>();
polygonArray.add(sides);
polygonArray.add(sidesLengths);
polygonArray.add(color);
polygonArray.add(id);
PolygonContainer polygon = new PolygonContainer(polygonArray);
theApp.polygons.add(polygon);
theApp.repaint();
JOptionPane.showMessageDialog(theApp, "Polygon" + id + "was added to the list.", "Success", JOptionPane.INFORMATION_MESSAGE);
} else {
JOptionPane.showMessageDialog(theApp, "The Polygon" + id + "was not added to the list as a valid Id was not provided.", "Error", JOptionPane.ERROR_MESSAGE);
}
}
}
import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
public class PolygonContainer implements Comparable<PolygonContainer>{
Color pColor = Color.BLACK; // Colour of the polygon, set to a Colour object, default set to black
int pId = 000000; // Polygon ID should be a six digit non-negative integer
int pSides; // Number of sides of the polygon, should be non-negative value
int pSideLengths; // Length of each side in pixels of the polygon, should be non-negative value
int polyCenX; // x value of centre point (pixel) of polygon when drawn on the panel
int polyCenY; // y value of centre point (pixel of polygon when drawn on the panel
int [] pointsX; // int array containing x values of each vertex (corner point) of the polygon
int [] pointsY; // int array containing y values of each vertex (corner point) of the polygon
// Constructor currently set the number of sides and the equal length of each side of the Polygon
//Constructor that takes the values from the array
public PolygonContainer(ArrayList<String> values){
this.pSides = Integer.parseInt(values.get(0));
this.pSideLengths = Integer.parseInt(values.get(1));
this.pColor = Color.getColor(values.get(2));
this.pId = Integer.parseInt(values.get(3));
pointsX = new int[pSides];
pointsY = new int[pSides];
}
// Used to populate the points array with the vertices corners (points) and construct a polygon with the
// number of sides defined by pSides and the length of each side defined by pSideLength.
// Dimension object that is passed in as an argument is used to get the width and height of the ContainerPanel
// and used to determine the x and y values of its centre point that will be used to position the drawn Polygon.
public Polygon getPolygonPoints(Dimension dim) {
polyCenX = dim.width / 2; // x value of centre point of the polygon
polyCenY = dim.height / 2; // y value of centre point of the polygon
Polygon p = new Polygon();
for (int i = 0; i < pSides; i++) {
// Calculate the x and y coordinates of the ith point of the polygon
int x = polyCenX + pSideLengths * (int) Math.cos(2.0 * Math.PI * i / pSides);
int y = polyCenY + pSideLengths * (int) Math.sin(2.0 * Math.PI * i / pSides);
// Add the x and y coordinates to the pointsX and pointsY arrays
pointsX[i] = x;
pointsY[i] = y;
// Add the point to the polygon object using the addPoint method
p.addPoint(x, y);
}
return p;
}
// You will need to modify this method to set the colour of the Polygon to be drawn
// Remember that Graphics2D has a setColor() method available for this purpose
public void drawPolygon(Graphics2D g, Dimension d) {
//Set color of polygon
g.setColor(pColor);
Polygon p = getPolygonPoints(d);
g.draw(p);
//this creates a bounding box around the polygon
Rectangle2D bounds = p.getBounds2D();
g.draw(bounds);
}
// gets a stored ID
public int getID() {
return pId;
}
#Override
// method used for comparing PolygonContainer objects based on stored ids, you need to complete the method
public int compareTo(PolygonContainer o) {
return 0;
}
// outputs a string representation of the PolygonContainer object, you need to complete this to use for testing
public String toString()
{
return "";
}
}
import javax.swing.JPanel;
import java.awt.*;
public class ContainerPanel extends JPanel{
ContainerFrame conFrame;
public ContainerPanel(ContainerFrame cf) {
conFrame = cf; // reference to ContainerFrame object
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D comp = (Graphics2D)g; // You will need to use a Graphics2D objects for this
Dimension size = getSize(); // You will need to use this Dimension object to get
// the width / height of the JPanel in which the
// Polygon is going to be drawn
for (PolygonContainer polygon : conFrame.polygons) {
polygon.drawPolygon(comp, size);
}
}
}
JFrame
I'm trying to rewrite this first triangle example in vala and failing this is what I have so far:
public class MyApp : Gtk.Application {
private MyAppWindow? myAppWindow;
public string appName;
public MyApp () {
Object (
application_id: "com.github.myusername.myreponame",
flags: ApplicationFlags.FLAGS_NONE
);
appName = "My App";
}
protected override void activate () {
myAppWindow = new MyAppWindow (this);
add_window (myAppWindow);
myAppWindow.show_all ();
}
public static int main (string[] args) {
var myApp = new MyApp ();
return myApp.run (args);
}
}
public class MyAppWindow : Gtk.ApplicationWindow {
public MyApp myApp { get; construct set; }
private Gtk.HeaderBar headerBar;
private Gtk.GLArea glArea;
private Gtk.Frame frame;
// An array of 3 vectors which represents 3 vertices
private GLES2.GLfloat[] g_vertex_buffer_data = { -1.0f, -1.0f, 0.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f };
// This will identify our vertex buffer
private GLES2.GLuint vertexbuffer;
private GLES2.GLuint programID;
public MyAppWindow(MyApp myApp) {
Object(myApp: myApp);
}
construct {
set_default_size (480, 640);
headerBar = new Gtk.HeaderBar ();
headerBar.set_show_close_button (true);
headerBar.set_title (myApp.appName);
glArea = new Gtk.GLArea ();
glArea.margin = 10;
frame = new Gtk.Frame ("GL Area");
frame.margin = 10;
// Generate 1 buffer, put the resulting identifier in vertexbuffer
GLES2.glGenBuffers(1, &vertexbuffer);
// The following commands will talk about our 'vertexbuffer' buffer
GLES2.glBindBuffer(GLES2.GL_ARRAY_BUFFER, vertexbuffer);
// Give our vertices to OpenGL.
GLES2.glBufferData(GLES2.GL_ARRAY_BUFFER, 9*4, g_vertex_buffer_data, GLES2.GL_STATIC_DRAW);
LoadShaders (out programID);
GLES2.glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
glArea.render.connect (() => {
GLES2.glClear (GLES2.GL_COLOR_BUFFER_BIT | GLES2.GL_DEPTH_BUFFER_BIT);
GLES2.glUseProgram(programID);
// 1st attribute buffer : vertices
GLES2.glEnableVertexAttribArray(0);
GLES2.glBindBuffer(GLES2.GL_ARRAY_BUFFER, vertexbuffer);
GLES2.glVertexAttribPointer(
0, // attribute 0. No particular reason for 0, but must match the layout in the shader.
3, // size
GLES2.GL_FLOAT, // type
GLES2.GL_FALSE, // normalized?
0, // stride
(void*)0 // array buffer offset
);
// Draw the triangle !
GLES2.glDrawArrays(GLES2.GL_TRIANGLES, 0, 3); // Starting from vertex 0; 3 vertices total -> 1 triangle
GLES2.glDisableVertexAttribArray(0);
GLES2.glFlush ();
return true;
});
set_titlebar (headerBar);
frame.add (glArea);
add (frame);
}
void LoadShaders(out GLES2.GLuint ProgramID) {
GLES2.GLint Result = GLES2.GL_FALSE;
int InfoLogLength = 0;
// create vertex shader
GLES2.GLuint VertexShaderID = GLES2.glCreateShader(GLES2.GL_VERTEX_SHADER);
string VertexSource = "#version 330 core
layout(location = 0) in vec3 vertexPosition_modelspace;
void main(){
gl_Position.xyz = vertexPosition_modelspace;
gl_Position.w = 1.0;
}";
// compile vertex shader
GLES2.glShaderSource(VertexShaderID, 1, out VertexSource, null);
GLES2.glCompileShader(VertexShaderID);
// check vertex shader
GLES2.glGetShaderiv(VertexShaderID, GLES2.GL_COMPILE_STATUS, &Result);
GLES2.glGetShaderiv(VertexShaderID, GLES2.GL_INFO_LOG_LENGTH, &InfoLogLength);
if ( InfoLogLength > 0 ) {
GLES2.GLchar[InfoLogLength+1] VertexShaderErrorMessage;
GLES2.glGetShaderInfoLog(VertexShaderID, InfoLogLength, null, &VertexShaderErrorMessage[0]);
}
// create fragment shader
GLES2.GLuint FragmentShaderID = GLES2.glCreateShader(GLES2.GL_FRAGMENT_SHADER);
string FragmentSource = "#version 330 core
out vec3 color;
void main(){
color = vec3(1,0,0);
}";
// compile fragment shader
GLES2.glShaderSource(FragmentShaderID, 1, out FragmentSource, null);
GLES2.glCompileShader(FragmentShaderID);
// check fragment shader
GLES2.glGetShaderiv(FragmentShaderID, GLES2.GL_COMPILE_STATUS, &Result);
GLES2.glGetShaderiv(FragmentShaderID, GLES2.GL_INFO_LOG_LENGTH, &InfoLogLength);
if ( InfoLogLength > 0 ){
GLES2.GLchar[InfoLogLength+1] FragmentShaderErrorMessage;
GLES2.glGetShaderInfoLog(FragmentShaderID, InfoLogLength, null, &FragmentShaderErrorMessage[0]);
}
ProgramID = GLES2.glCreateProgram();
GLES2.glAttachShader(ProgramID, VertexShaderID);
GLES2.glAttachShader(ProgramID, FragmentShaderID);
GLES2.glLinkProgram(ProgramID);
// Check the program
GLES2.glGetProgramiv(ProgramID, GLES2.GL_LINK_STATUS, &Result);
GLES2.glGetProgramiv(ProgramID, GLES2.GL_INFO_LOG_LENGTH, &InfoLogLength);
if ( InfoLogLength > 0 ){
GLES2.GLchar[InfoLogLength+1] ProgramErrorMessage;
GLES2.glGetProgramInfoLog(ProgramID, InfoLogLength, null, &ProgramErrorMessage[0]);
}
GLES2.glDetachShader(ProgramID, VertexShaderID);
GLES2.glDetachShader(ProgramID, FragmentShaderID);
GLES2.glDeleteShader(VertexShaderID);
GLES2.glDeleteShader(FragmentShaderID);
}
}
I compile it with valac --pkg gtk+-3.0 --vapidir=. --pkg gles2 valagl.vala -o valagl --Xcc=-lGLESv2. I have a gles2.vapi in the same folder.
There are 2 [-Wincompatible-pointer-types] warnings in glShaderSource for the shader source string at compile time. That could be where the problem is but I do not know how to fix it.
expected ‘const GLchar * const* {aka const char * const*}’ but argument is of type ‘gchar ** {aka char **}
The example has a step of glfwSwapBuffers(). I'm not sure what needs to be done there. I use GLES2.glFlush () but I do not understand how it connects to the GLArea I just created.
Also valadoc goes on about an on_realize signal where shaders need to be initialized, but I cant seem to find an on_realize signal at all
How do I draw a simple triangle in a GTK3 window using GLES2?
The program runs and shows a black GLArea. The only thing that works is the color of that area, I can change the color by changing GLES2.glClearColor (0.0f, 0.0f, 0.0f, 0.0f)
I created QAbstractTableModel subclass for represent it's like a table in Qml. When in qml i used GridView, or ListView items, they used only first column to represent. According to documentation : http://doc.qt.io/qt-5/qml-qtquick-gridview.html this classes uses QAbstractListModel. Is there any class, to correct representation QAbstractTableModel in qml, like a Grid?
There is .h file of my Model (All functions below are implemented in C++)
class ButtonModel : public QAbstractTableModel
{
Q_OBJECT
public:
enum ButtonRoles {
BUTTON_ID_ROLE = Qt::UserRole + 1,
};
enum ColumnNames{
FIRST = 0,
SECOND,
THIRD,
FOURTH,
FIFTH,
SIXTH,
SEVENTH,
LAST
};
ButtonModel(QObject* parent = 0);
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
bool loadModel (const QVector<QHash<ColumnNames, Button *>> &buttons, const QModelIndex &parent = QModelIndex());
private:
QVector<QHash<ColumnNames, Button*>> _buttons;
};
And data() function implementation
QVariant ButtonModel::data(const QModelIndex &index, int role) const
{
if ((!index.isValid()) || (this->rowCount() <= index.row()) || (this->columnCount() <= index.column())){
return QVariant();
}
switch (role){
case ButtonRoles::BUTTON_ID_ROLE:
return QVariant(_buttons[index.row()][ColumnNames(index.column())]->buttonId());
break;
case Qt::DisplayRole:
return QVariant(_buttons[index.row()][ColumnNames(index.column())]->displayText());
break;
default:
return QVariant();
}
}
You probably want a QTableView not a QGridView.
A grid view is really just a different layout for a list, whereas a table view does have multiple columns and can take its model data from a C++ QAbstractTableModel.
TableView QML Type | Qt Quick Controls 5.9
I'm converting a swift project to objective c, but i get some trouble because i don't know how to convert follow code. Please help me. Thanks!
public enum UPCarouselFlowLayoutSpacingMode {
case fixed(spacing: CGFloat)
case overlap(visibleOffset: CGFloat)
}
and
fileprivate var currentPage: Int = 0 {
didSet {
let character = self.items[self.currentPage]
self.infoLabel.text = character.name.uppercased()
self.detailLabel.text = character.movie.uppercased()
}
}
The first (an enum with associated values) has no direct equivalent in Objective-C. For your particular example, you could use something like this:
typedef NS_ENUM(NSInteger, UPCarouselFlowLayoutSpacingMode) {
UPCarouselFlowLayoutSpacingModeFixed,
UPCarouselFlowLayoutSpacingModeOverlap
};
typedef struct {
UPCarouselFlowLayoutSpacingMode mode;
CGFloat amount;
} UPCarouselFlowLayoutSpacing;
You would just pass around values of type UPCarouselFlowLayoutSpacing. You could create helper functions to make these easier to create, e.g.
UPCarouselFlowLayoutSpacing UPCarouselFlowLayoutSpacingMakeFixed(CGFloat spacing) {
UPCarouselFlowLayoutSpacing value;
value.mode = UPCarouselFlowLayoutSpacingModeFixed;
value.amount = spacing;
return value;
}
UPCarouselFlowLayoutSpacing UPCarouselFlowLayoutSpacingMakeOverlap(CGFloat visibleOffset) {
UPCarouselFlowLayoutSpacing value;
value.mode = UPCarouselFlowLayoutSpacingModeOverlap;
value.amount = visibleOffset;
return value;
}
For the second, you can override the setter method of your Objective-C class's currentPage property:
- (void)setCurrentPage:(NSInteger)page {
_page = page;
MovieCharacter *character = self.items[page];
self.infoLabel.text = character.name.localizedUppercaseString;
self.detailLabel.text = character.movie.localizedUppercaseString;
}
In libgdx, how to create dynamic texture? e.g: create hill or mountain?like the Game
Thank you for your answer, i am waitting for your reply.
Example
=======
package com.badlogic.gdx.tests.bullet;
/**
Question: In libgdx, how to create dynamic texture?
Answer : Use a private render function to draw in a private frame buffer
convert the frame bufder to Pixmap, create Texture.
Author : Jon Goodwin
**/
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Pixmap;
...//(ctrl-shift-o) to auto-load imports in Eclipse
public class BaseBulletTest extends BulletTest
{
//class variables
=================
public Texture texture = null;//create this
public Array<Disposable> disposables = new Array<Disposable>();
public Pixmap pm = null;
//---------------------------
#Override
public void create ()
{
init();
}
//---------------------------
public static void init ()
{
if(texture == null) texture(Color.BLUE, Color.WHITE);
TextureAttribute ta_tex = TextureAttribute.createDiffuse(texture);
final Material material_box = new Material(ta_tex, ColorAttribute.createSpecular(1, 1, 1, 1),
FloatAttribute.createShininess(8f));
final long attributes1 = Usage.Position | Usage.Normal | Usage.TextureCoordinates;
final Model boxModel = modelBuilder.createBox(1f, 1f, 1f, material_box, attributes1);
...
}
//---------------------------
public Texture texture(Color fg_color, Color bg_color)
{
Pixmap pm = render( fg_color, bg_color );
texture = new Texture(pm);//***here's your new dynamic texture***
disposables.add(texture);//store the texture
}
//---------------------------
public Pixmap render(Color fg_color, Color bg_color)
{
int width = Gdx.graphics.getWidth();
int height = Gdx.graphics.getHeight();
SpriteBatch spriteBatch = new SpriteBatch();
m_fbo = new FrameBuffer(Format.RGB565, (int)(width * m_fboScaler), (int)(height * m_fboScaler), false);
m_fbo.begin();
Gdx.gl.glClearColor(bg_color.r, bg_color.g, bg_color.b, bg_color.a);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
Matrix4 normalProjection = new Matrix4().setToOrtho2D(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
spriteBatch.setProjectionMatrix(normalProjection);
spriteBatch.begin();
spriteBatch.setColor(fg_color);
//do some drawing ***here's where you draw your dynamic texture***
...
spriteBatch.end();//finish write to buffer
pm = ScreenUtils.getFrameBufferPixmap(0, 0, (int) width, (int) height);//write frame buffer to Pixmap
m_fbo.end();
// pm.dispose();
// flipped.dispose();
// tx.dispose();
m_fbo.dispose();
m_fbo = null;
spriteBatch.dispose();
// return texture;
return pm;
}
//---------------------------
}//class BaseBulletTest
//---------------------------