Get ground textures working, but not yet abstracted to the shape class.

3 files changed, 120 insertions, 17 deletions

diff --git a/src/glwidget.cpp b/src/glwidget.cpp
index 263b7dd..472966b 100755
--- a/src/glwidget.cpp
+++ b/src/glwidget.cpp
@@ -70,12 +70,87 @@ void GLWidget::initializeGL()
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_CULL_FACE);
     glCullFace(GL_BACK);
-   // glShadeModel(GL_SMOOTH);
+//    glShadeModel(GL_SMOOTH);
 
 
     // Initialize shaders
     m_defaultShader = new Shader(":resources/shaders/shader.vert",      ":resources/shaders/shader.frag");
     m_pointShader   = new Shader(":resources/shaders/anchorPoint.vert", ":resources/shaders/anchorPoint.geom", ":resources/shaders/anchorPoint.frag");
+//    m_texture_shader = new Shader(":/resources/shaders/texture.vert", ":/resources/shaders/texture.frag");
+
+    // INITIALIZE TEXTURE STUFF
+
+    // Prepare filepath
+    QString kitten_filepath = QString(":/resources/images/kitten.png");
+
+    // TASK 1: Obtain image from filepath
+    m_image = QImage(kitten_filepath);
+
+    // TASK 2: Format image to fit OpenGL
+    m_image = m_image.convertToFormat(QImage::Format_RGBA8888).mirrored();
+
+    auto bits = m_image.bits();
+
+    // TASK 3: Generate kitten texture
+    glGenTextures(1, &m_kitten_texture);
+
+    // TASK 9: Set the active texture slot to texture slot 0
+    glActiveTexture(GL_TEXTURE0);
+
+    // TASK 4: Bind kitten texture
+    glBindTexture(GL_TEXTURE_2D, m_kitten_texture);
+
+    // TASK 5: Load image into kitten texture
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_image.width(), m_image.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, m_image.bits());
+
+    // TASK 6: Set min and mag filters' interpolation mode to linear
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    // TASK 7: Unbind kitten texture
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+//    // TASK 10: set the texture.frag uniform for our texture
+//    glUseProgram(m_texture_shader->id());
+//    glUniform1i(glGetUniformLocation(m_texture_shader->id(), "sampler"), 0);
+//    glUseProgram(0);
+
+    glUseProgram(m_defaultShader->id());
+    glUniform1i(glGetUniformLocation(m_defaultShader->id(), "sampler"), 0);
+    glUseProgram(0);
+
+//    // TASK 11: Fix this "fullscreen" quad's vertex data
+//    // TASK 12: Play around with different values!
+//    // TASK 13: Add UV coordinates
+//    std::vector<GLfloat> fullscreen_quad_data =
+//    { //     POSITIONS    //    UVs    //
+//        -1.0f,  1.0f, 0.0f, 0.0f, 1.0f,
+//        -1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
+//         1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
+//         1.0f,  1.0f, 0.0f, 1.0f, 1.0f,
+//        -1.0f,  1.0f, 0.0f, 0.0f, 1.0f,
+//         1.0f, -1.0f, 0.0f, 1.0f, 0.0f
+//    };
+
+//    // Generate and bind a VBO and a VAO for a fullscreen quad
+//    glGenBuffers(1, &m_fullscreen_vbo);
+//    glBindBuffer(GL_ARRAY_BUFFER, m_fullscreen_vbo);
+//    glBufferData(GL_ARRAY_BUFFER, fullscreen_quad_data.size()*sizeof(GLfloat), fullscreen_quad_data.data(), GL_STATIC_DRAW);
+//    glGenVertexArrays(1, &m_fullscreen_vao);
+//    glBindVertexArray(m_fullscreen_vao);
+
+//    // TASK 14: modify the code below to add a second attribute to the vertex attribute array
+//    glEnableVertexAttribArray(0);
+//    glEnableVertexAttribArray(1);
+//    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), nullptr);
+//    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), reinterpret_cast<void *>(3 * sizeof(GLfloat)));
+
+//    // Unbind the fullscreen quad's VBO and VAO
+//    glBindBuffer(GL_ARRAY_BUFFER, 0);
+//    glBindVertexArray(0);
+
+    // END INITIALIZE TEXTURE STUFF
+
 
     // Initialize ARAP, and get parameters needed to decide the camera position, etc
     Vector3f coeffMin, coeffMax;
@@ -111,11 +186,30 @@ void GLWidget::initializeGL()
     m_arap.initGroundPlane(":resources/images/kitty.png", 2, m_defaultShader);
 }
 
+//void GLWidget::paintTexture(GLuint texture, bool filtered){
+////    glUseProgram(m_texture_shader->id());
+//    m_texture_shader->bind();
+//    // TASK 32: Set your bool uniform on whether or not to filter the texture drawn
+////    glUniform1i(glGetUniformLocation(m_texture_shader->id(), "filtered"), filtered);
+//    m_texture_shader->setUniform("filtered", filtered);
+//    // TASK 10: Bind "texture" to slot 0
+//    glActiveTexture(GL_TEXTURE0);
+//    glBindTexture(GL_TEXTURE_2D, texture);
+//    glBindVertexArray(m_fullscreen_vao);
+////    std::cout << texture << std::endl;
+//    glDrawArrays(GL_TRIANGLES, 0, 6);
+//    glBindTexture(GL_TEXTURE_2D, 0);
+//    glBindVertexArray(0);
+//    glUseProgram(0);
+//    m_texture_shader->unbind();
+//}
+
 void GLWidget::paintGL()
 {
-    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-    glEnable( GL_BLEND );
+//    paintTexture(m_kitten_texture, false);
+//    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+//    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+//    glEnable( GL_BLEND );
 
     m_defaultShader->bind();
     m_defaultShader->setUniform("proj", m_camera.getProjection());
@@ -124,7 +218,9 @@ void GLWidget::paintGL()
     m_defaultShader->setUniform("inverseView", inverseView);
     m_defaultShader->setUniform("widthBounds", m_arap.minCorner[0], m_arap.maxCorner[0]);
     m_defaultShader->setUniform("lengthBounds", m_arap.minCorner[2], m_arap.maxCorner[2]);
-//    m_defaultShader->setUniform("");
+
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, m_kitten_texture);
     m_arap.draw(m_defaultShader, GL_TRIANGLES);
     m_defaultShader->unbind();
 
@@ -132,14 +228,14 @@ void GLWidget::paintGL()
 
     glClear(GL_DEPTH_BUFFER_BIT);
 
-//    m_pointShader->bind();
-//    m_pointShader->setUniform("proj",   m_camera.getProjection());
-//    m_pointShader->setUniform("view",   m_camera.getView());
-//    m_pointShader->setUniform("vSize",  m_vSize);
-//    m_pointShader->setUniform("width",  width());
-//    m_pointShader->setUniform("height", height());
-//    m_arap.draw(m_pointShader, GL_POINTS);
-//    m_pointShader->unbind();
+////    m_pointShader->bind();
+////    m_pointShader->setUniform("proj",   m_camera.getProjection());
+////    m_pointShader->setUniform("view",   m_camera.getView());
+////    m_pointShader->setUniform("vSize",  m_vSize);
+////    m_pointShader->setUniform("width",  width());
+////    m_pointShader->setUniform("height", height());
+////    m_arap.draw(m_pointShader, GL_POINTS);
+////    m_pointShader->unbind();
 }
 
 void GLWidget::resizeGL(int w, int h)
diff --git a/src/glwidget.h b/src/glwidget.h
index b319756..6433e22 100755
--- a/src/glwidget.h
+++ b/src/glwidget.h
@@ -29,6 +29,7 @@ private:
     // Basic OpenGL Overrides
     void initializeGL()         override;
     void paintGL()              override;
+    void paintTexture(GLuint texture, bool filtered);
     void resizeGL(int w, int h) override;
 
     // Event Listeners
@@ -48,6 +49,12 @@ private:
     Camera  m_camera;
     Shader *m_defaultShader;
     Shader *m_pointShader;
+    Shader *m_texture_shader;
+
+    GLuint m_fullscreen_vbo;
+    GLuint m_fullscreen_vao;
+    QImage m_image;
+    GLuint m_kitten_texture;
 
     float m_movementScaling;
     float m_vertexSelectionThreshold;
diff --git a/src/graphics/shape.cpp b/src/graphics/shape.cpp
index c5dde0d..824a012 100644
--- a/src/graphics/shape.cpp
+++ b/src/graphics/shape.cpp
@@ -127,12 +127,12 @@ void Shape::draw(Shader *shader, GLenum mode)
         shader->setUniform("blue",  m_blue);
         shader->setUniform("alpha", m_alpha);
         glBindVertexArray(m_surfaceVao);
-        glActiveTexture(GL_TEXTURE0);
-        glBindTexture(GL_TEXTURE_2D, ocean_floor_texture);
-        shader->setUniform("sampler", 1);
+//        glActiveTexture(GL_TEXTURE0);
+//        glBindTexture(GL_TEXTURE_2D, ocean_floor_texture);
+//        shader->setUniform("sampler", 0);
         glDrawElements(mode, m_numSurfaceVertices, GL_UNSIGNED_INT, reinterpret_cast<GLvoid *>(0));
         glBindVertexArray(0);
-        glBindTexture(GL_TEXTURE_2D, 0);
+//        glBindTexture(GL_TEXTURE_2D, 0);
         break;
     }
     case GL_POINTS: