[SOLVED] Repeating texture in QT3D - multiple usage of the same texture

[sibislaw2]

HI ! I am a new user of Qt3D and i want to use single texture on single quad multiple times. Here is the code :

Quad {
    scale: 100.0
    position: Qt.vector3d(0,0,0)

     effect: Effect {
         color: "#FFFFFF"
         texture: "rockwall.png"

     }
 }

Now there is single texture on Quad. What can i do to have this texture repeated on this quad several times ?

[sibislaw2]

Can anyone can help me ? I even appreciate telling me that this isnt possible.

[onek24]

Hello and welcome to qt-project.org,
i'm sorry that no one could help you out yet. I'll check it out and after that i'll tell you what i found.

--Attach--

Maybe horizontalWrap and verticalWrap is what you are searching for?
"HorizontalWrap":http://doc.qt.digia.com/qt-quick3d-snapshot/qgltexture2d.html#horizontalWrap
"TextureWrap":http://doc.qt.digia.com/qt-quick3d-snapshot/qgl.html#TextureWrap-enum

I havn't worked with Qt3d so i might be wrong. Please tell me if the information could help you.

[sibislaw2]

Yes, it is good, but how to use it in QML ? i mean i dont see possibility in QML to set coordinates for texture.

[onek24]

There is not that much information about QML Quad in the documentation:
"QML Quad":http://doc.qt.digia.com/qt-quick3d-snapshot/qml-quad.html#details

It looks like Quad is preferably used for testings : "...usually for testing material effects...". Isn't there some other Item that you could use for that, because i don't think that you can repeat the texture in a Quad.

Maybe you'll find some usefull information here:
"Item3D":http://doc-snapshot.qt-project.org/qt3d-1.0/qml-item3d.html

[sibislaw2]

So, is there any possibility of making Quad (not using Quad element), maybe from triangles using Item3D ? And texturing them ?

Maybe there is simple method of repeating quad element ?

[onek24]

I'm sure that there must be a way to repeat textures. I have not worked with Qt3D yet so i can' tell you, but i would give Item3D a try. Otherwise you'll have to wait for someone's else answer or repeat your quad elements, this should work if you use Repeater Items.

[sibislaw2]

I found the way using shader program, here is the code

 @Quad {
    scale: 100.0
    position: Qt.vector3d(0,0,0)
    effect: program1
 }

 ShaderProgram {
     id: program1
     texture: "rockwall.png"

     vertexShader: "
     attribute highp vec4 qt_Vertex;
     uniform highp mat4 qt_ModelViewProjectionMatrix;

     attribute highp vec4 qt_MultiTexCoord0;
     varying highp vec4 texCoord;

     void main(void)
     {
        texCoord = qt_MultiTexCoord0*4;
        gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex;
     }
     "
     fragmentShader: "
     varying highp vec4 texCoord;
     uniform sampler2D qt_Texture0;

     void main(void)
     {
         mediump vec4 textureColor = texture2D(qt_Texture0, texCoord.st);
         gl_FragColor = textureColor;
     }
     "
 }@

The topic is closed, and thanks for help everyone. Line 20 repeats texture for 4-times on axis x and y, from one texture there will be 16 all over quad.