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Quellcode

// VERTEX

#version 150

uniform mat4 projection, modelview;
in vec3 vertex0;
in vec2 texCoord0;

out vec2 texCoord;

void main(){
    texCoord = texCoord0; // hiermit funktioniert es nicht
    gl_Position = projection*modelview*vec4(vertex0, 1.0);
}

// FRAGMENT

#version 150

precision highp float;

uniform sampler2D texture0;
in vec2 texCoord;

void main(){
    gl_FragColor = texture(texture0, texCoord.st);
}

C-/C++-Quelltext

void Model::render(mat4 projection, mat4 modelview){
    mat4 m = getModelview(modelview);

    m_shader->bindShader();
    m_shader->sendUniform4x4("projection", projection.getArray());
    m_shader->sendUniform4x4("modelview", m.getArray());
    m_shader->sendUniform("texture0", 0);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, m_texture->getTextureID());

    m_shader->enableVertexAttribArrays();

    glBindBuffer(GL_ARRAY_BUFFER, m_model->getVertexBuffer());
    glVertexAttribPointer((GLint)0, 3, GL_FLOAT, GL_FALSE, 0, 0);
    glBindBuffer(GL_ARRAY_BUFFER, m_model->getTexCoordBuffer());
    glVertexAttribPointer((GLint)1, 2, GL_FLOAT, GL_FALSE, 0, 0);

    glDrawElements(GL_TRIANGLES, m_model->getIndexCount(), GL_UNSIGNED_INT, &m_model->getIndices());

    m_shader->disableVertexAttribArrays();
}

C-/C++-Quelltext

shader.push_back(new Shader("res/shader/sa_model.vsh", "res/shader/sa_model.fsh")); // vector (hier nur ein Shader enthalten)
shader[0]->bindAttrib(SHADER_VERTEX, 0, "vertex0", 2); // Verwendungszweck (unwichtig), Index (für glEnable...), Name, Größe
shader[0]->bindAttrib(SHADER_TEXCOORD, 1, "texCoord0", 2);
shader[0]->initialize();

C-/C++-Quelltext

void reshape(int w, int h){
    wndSize[0] = w;
    wndSize[1] = h;

    glViewport(0, 0, wndSize[0], wndSize[1]); // Viewport anpassen

    // Sprites anpassen
    sprites[0]->setViewport(0, 0, w, h); // <- passt Projection an
}

C-/C++-Quelltext

glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT); // kein depth buffer (GL_DEPTH_BUFFER_BIT) weil orthogonal
    
sprites[0]->render();

glutSwapBuffers();

C-/C++-Quelltext

void Sprite::render(){ // <- wird in Hauptrenderfunktion aufgerufen
    if(m_haveShader && m_haveTexture){ // muss Shader und Textur haben (hat es)
        render(m_projection, getModelview(), m_shader, m_texture);
    }
}

void Sprite::render(mat4 projection, mat4 modelview, Shader *shader, Texture *texture){ // wird von render() aufgerufen     
    shader->bindShader();
    shader->sendUniform4x4("projection", projection.getArray());
    shader->sendUniform4x4("modelview", modelview.getArray());
    shader->sendUniform("texture0", 0);
                    
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, texture->getTextureID());

    glEnableVertexAttribArray(0);
    glEnableVertexAttribArray(1);
                        
    glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer);
    glVertexAttribPointer((GLint)0, 2, GL_FLOAT, GL_FALSE, 0, 0);               
    glBindBuffer(GL_ARRAY_BUFFER, m_texCoordBuffer);
    glVertexAttribPointer((GLint)1, 2, GL_FLOAT, GL_FALSE, 0, 0);
    
    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, &m_indices[0]);
    
    glDisableVertexAttribArray(0);
    glDisableVertexAttribArray(1);
}

Quellcode

#version 150

uniform mat4 projection;
uniform mat4 modelview;
in vec2 vertex0;
in vec2 texCoord0;

out vec2 texCoord;

void main(){
    texCoord = texCoord0; // <- hier liegt der Fehler, denke ich!
    gl_Position = projection*modelview*vec4(vertex0, 0.0, 1.0);
}

Quellcode

#version 150

precision highp float;

uniform sampler2D texture0;
in vec2 texCoord;

void main(){
    gl_FragColor = texture(texture0, texCoord.st);
}

Quellcode

[...]

//out vec2 texCoord;

void main(){
    //texCoord = texCoord0;
    gl_Position = projection*modelview*vec4(vertex0, 0.0, 1.0);
}