Re: [Vala] How to bitwise math and implement a jagged array in Vala?



Ok, you lost me some how
checkImage = makeCheckImage()
not sure where this goes, sorry I am still kind of new at this an there is not a decent IDE or debugger for Vala not to mention the documentation half the time does not make any sense. If you know of a good IDE, except for anjuta which crashes half the time please let me know. Mono develop does not work with Vala as far as I can tell. I use gedit and make files do to most of the coding.

Thanks
Tom




On 07/03/2013 11:55 PM, Simon Kågedal Reimer wrote:

Hi! Evan's makeCheckImage function creates a new array and passes it to the caller as a return value. You need to store it in the variable that is passed to glTexImage2D; right now you are indeed giving it an empty (uninitialized) texture array. Change the call to:

checkImage = makeCheckImage()

/simon

Den 4 jul 2013 03.07, "Thomas F Steinhauer" <tom_steinhauer hotmail com <mailto:tom_steinhauer hotmail com>> skrev:

Dear Evan,
I tried the code that you have listed, It worked but no texture showed up on the quads. They were empty.

I have pasted the whole code here as I have it now in hopes that someone might be able to figure out what is going on or maybe if I did something wrong.


    /*
     * Texture: CheckerBoard-pattern texture
     */

    const int checkImageWidth = 64;      // Texture image rows and
    columns
    const int checkImageHeight = 64;
    GLubyte [,,] checkImage; // Texture image data
    GLuint texName;

    private static uint8[,,] makeCheckImage (int width = 64, int
    height = 64) {


    >   uint8[,,] check_image = new uint8[height,width,4];
    >
    >   for ( var i = 0 ; i < height ; i++ ) {...

    void init()
    {
       glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
       glShadeModel(GL_FLAT);
       glEnable(GL_DEPTH_TEST);

       makeCheckImage();
       glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

       glGenTextures(1, (GLuint[])texName);
       glBindTexture(GL_TEXTURE_2D, texName);

       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
       glTexImage2D(GL_TEXTURE_2D, 0, (GLint)GL_RGBA,
    checkImageWidth, checkImageHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE,
    checkImage);
    }

    void display()
    {
       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
       glEnable(GL_TEXTURE_2D);
       glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
       glBindTexture(GL_TEXTURE_2D, texName);
       glBegin(GL_QUADS);
       glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.0f, -1.0f, 0.0f);
       glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.0f, 1.0f, 0.0f);
       glTexCoord2f(1.0f, 1.0f); glVertex3f(0.0f, 1.0f, 0.0f);
       glTexCoord2f(1.0f, 0.0f); glVertex3f(0.0f, -1.0f, 0.0f);

       glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 0.0f);
       glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, 0.0f);
       glTexCoord2f(1.0f, 1.0f); glVertex3f(2.41421f, 1.0f, -1.41421f);
       glTexCoord2f(1.0f, 0.0f); glVertex3f(2.41421f, -1.0f, -1.41421f);
       glEnd();
       glFlush();
       glDisable(GL_TEXTURE_2D);
    }

    void reshape(int w, int h)
    {
       glViewport(0, 0, (GLsizei) w, (GLsizei) h);
       glMatrixMode(GL_PROJECTION);
       glLoadIdentity();
       gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 30.0);
       glMatrixMode(GL_MODELVIEW);
       glLoadIdentity();
       glTranslatef(0.0f, 0.0f, -3.6f);
    }

    void keyboard (uchar key, int x, int y)
    {
       switch (key) {
          case 27:
             //exit(0);
             break;
          default:
             break;
       }
    }

    void main(string[] args)
    {
       glutInit(ref args.length, args);
       glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA | GLUT_DEPTH);
       glutInitWindowSize(250, 250);
       glutInitWindowPosition(100, 100);
       glutCreateWindow("checker");
       init();
       glutDisplayFunc(display);
       glutReshapeFunc(reshape);
       glutKeyboardFunc(keyboard);
       glutMainLoop();
    }


Thanks
Tom

On 07/02/2013 07:02 PM, Evan Nemerson wrote:

>
> On Tue, 2013-07-02 at 18:49 -0500, Thomas F Steinhauer wrote:
>>
>> I tried your code as you sug...




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