QGLTexture2D Texture not showing up

  • Trying to get some simple textureing working in Qt5.2 ( OpenGL )

    I have a quad ( drawn as two triangles ) and i am just trying to apply a texture to it but all i ever see is solid color.

    I have drawn the quad as wire frame to test that the data in the VBOs is OK. I'm pretty sure the texture coords are also OK as it's just a quad so starting at (0,0) to (1,1) to map the whole texture.

    I read in the texture like this;

    @QImage textureImage ( 1024, 1024, QImage::Format_ARGB32 );
    if ( textureImage.load ( "Resources\Data\Images\texture.png" ) ) {
    textureImage = QGLWidget::convertToGLFormat ( textureImage ); // Need this?
    m_texture = new QGLTexture2D;
    m_texture->setImage ( textureImage );@

    Then later on i bind it before drawing;

    glDrawElements ( GL_TRIANGLES, m_numIndices, GL_UNSIGNED_SHORT, 0 );

    But i'm not seeing anything that looks like the texture, just solid color.

    The shaders are simple. The Vertex shader;

    @#version 330

    layout (location = 0) in vec3 VertexPosition;
    layout (location = 1) in vec3 VertexColor;
    layout (location = 2) in vec2 VertexTexCoord;

    out vec3 VPosition;
    out vec3 VColor;
    out vec2 VTexture;

    uniform mat4 ModelViewMatrix;
    uniform mat3 NormalMatrix;
    uniform mat4 ProjectionMatrix;

    void main() {
    VColor = VertexColor;
    VTexture = VertexTexCoord;
    mat4 MVP = ProjectionMatrix * ModelViewMatrix;
    VPosition = vec3(ModelViewMatrix * vec4( VertexPosition, 1.0) );
    gl_Position = MVP * vec4( VertexPosition, 1.0 );

    Fragment shader

    @#version 330

    uniform sampler2D myTexture;

    in vec3 VPosition;
    in vec3 VColor;
    in vec2 VTexCoord;

    layout( location = 0 ) out vec4 FragColor;

    void main() {
    FragColor = texture( myTexture, VTexCoord );

    Any help much appreciated.

Log in to reply

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.