refactor: Extract view cube rendering to dedicated class

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>
2026-02-09 16:04:40 -07:00
parent be35ae3196
commit 732a7bd428
5 changed files with 177 additions and 131 deletions
--- a/src/ViewCube.cpp
+++ b/src/ViewCube.cpp
@@ -0,0 +1,138 @@
+#include "ViewCube.h"
+#include <QPainter>
+#include <QFont>
+
+ViewCube::ViewCube()
+{
+}
+
+void ViewCube::initializeGL()
+{
+    initializeOpenGLFunctions();
+    createFaceTextures();
+}
+
+void ViewCube::paintGL(const QMatrix4x4& viewMatrix, int width, int height)
+{
+    int viewCubeSize = 150;
+    glViewport(width - viewCubeSize, height - viewCubeSize, viewCubeSize, viewCubeSize);
+    glClear(GL_DEPTH_BUFFER_BIT);
+
+    QMatrix4x4 viewCubeProjection;
+    viewCubeProjection.ortho(-2, 2, -2, 2, -10, 10);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadMatrixf(viewCubeProjection.constData());
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadMatrixf(viewMatrix.constData());
+
+    drawViewCube();
+    drawAxes();
+}
+
+void ViewCube::createFaceTextures()
+{
+    QStringList labels = {"FRONT", "BACK", "TOP", "BOTTOM", "RIGHT", "LEFT"};
+    glGenTextures(6, faceTextures);
+
+    for (int i = 0; i < 6; ++i) {
+        QImage image(128, 128, QImage::Format_RGBA8888);
+        image.fill(qRgba(204, 204, 204, 255)); // light gray background
+
+        QPainter painter(&image);
+        painter.setPen(Qt::black);
+        painter.setFont(QFont("Arial", 24, QFont::Bold));
+        painter.drawText(image.rect(), Qt::AlignCenter, labels[i]);
+
+        QImage glImage = image.mirrored(false, true);
+
+        glBindTexture(GL_TEXTURE_2D, faceTextures[i]);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, glImage.width(), glImage.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, glImage.bits());
+    }
+}
+
+void ViewCube::drawViewCube()
+{
+    float size = 0.75;
+    glEnable(GL_TEXTURE_2D);
+    glColor3f(1.0, 1.0, 1.0); // Use white so texture colors are not modulated
+
+    // Front face
+    glBindTexture(GL_TEXTURE_2D, faceTextures[0]);
+    glBegin(GL_QUADS);
+    glTexCoord2f(0.0, 0.0); glVertex3f(-size, -size, size);
+    glTexCoord2f(1.0, 0.0); glVertex3f(size, -size, size);
+    glTexCoord2f(1.0, 1.0); glVertex3f(size, size, size);
+    glTexCoord2f(0.0, 1.0); glVertex3f(-size, size, size);
+    glEnd();
+
+    // Back face
+    glBindTexture(GL_TEXTURE_2D, faceTextures[1]);
+    glBegin(GL_QUADS);
+    glTexCoord2f(1.0, 0.0); glVertex3f(-size, -size, -size);
+    glTexCoord2f(1.0, 1.0); glVertex3f(-size, size, -size);
+    glTexCoord2f(0.0, 1.0); glVertex3f(size, size, -size);
+    glTexCoord2f(0.0, 0.0); glVertex3f(size, -size, -size);
+    glEnd();
+
+    // Top face
+    glBindTexture(GL_TEXTURE_2D, faceTextures[2]);
+    glBegin(GL_QUADS);
+    glTexCoord2f(0.0, 1.0); glVertex3f(-size, size, -size);
+    glTexCoord2f(0.0, 0.0); glVertex3f(-size, size, size);
+    glTexCoord2f(1.0, 0.0); glVertex3f(size, size, size);
+    glTexCoord2f(1.0, 1.0); glVertex3f(size, size, -size);
+    glEnd();
+
+    // Bottom face
+    glBindTexture(GL_TEXTURE_2D, faceTextures[3]);
+    glBegin(GL_QUADS);
+    glTexCoord2f(1.0, 1.0); glVertex3f(-size, -size, -size);
+    glTexCoord2f(0.0, 1.0); glVertex3f(size, -size, -size);
+    glTexCoord2f(0.0, 0.0); glVertex3f(size, -size, size);
+    glTexCoord2f(1.0, 0.0); glVertex3f(-size, -size, size);
+    glEnd();
+
+    // Right face
+    glBindTexture(GL_TEXTURE_2D, faceTextures[4]);
+    glBegin(GL_QUADS);
+    glTexCoord2f(1.0, 0.0); glVertex3f(size, -size, -size);
+    glTexCoord2f(1.0, 1.0); glVertex3f(size, size, -size);
+    glTexCoord2f(0.0, 1.0); glVertex3f(size, size, size);
+    glTexCoord2f(0.0, 0.0); glVertex3f(size, -size, size);
+    glEnd();
+
+    // Left face
+    glBindTexture(GL_TEXTURE_2D, faceTextures[5]);
+    glBegin(GL_QUADS);
+    glTexCoord2f(0.0, 0.0); glVertex3f(-size, -size, -size);
+    glTexCoord2f(1.0, 0.0); glVertex3f(-size, -size, size);
+    glTexCoord2f(1.0, 1.0); glVertex3f(-size, size, size);
+    glTexCoord2f(0.0, 1.0); glVertex3f(-size, size, -size);
+    glEnd();
+
+    glDisable(GL_TEXTURE_2D);
+}
+
+void ViewCube::drawAxes()
+{
+    glLineWidth(2.0f);
+    glBegin(GL_LINES);
+    // X-axis (red)
+    glColor3f(1.0, 0.0, 0.0);
+    glVertex3f(0.0, 0.0, 0.0);
+    glVertex3f(1.5, 0.0, 0.0);
+    // Y-axis (green)
+    glColor3f(0.0, 1.0, 0.0);
+    glVertex3f(0.0, 0.0, 0.0);
+    glVertex3f(0.0, 1.5, 0.0);
+    // Z-axis (blue)
+    glColor3f(0.0, 0.0, 1.0);
+    glVertex3f(0.0, 0.0, 0.0);
+    glVertex3f(0.0, 0.0, 1.5);
+    glEnd();
+    glLineWidth(1.0f);
+}