[Renderer] 3D axis depend on Fov

sarthou · Aug 23, 2024 · 26455d9 · 26455d9
1 parent d6b44c0
commit 26455d9
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/include/overworld/Engine/Common/Camera/Camera.h b/include/overworld/Engine/Common/Camera/Camera.h
@@ -52,6 +52,7 @@ namespace owds {
     glm::mat4 getProjectionMatrix() const { return proj_matrix_; }
     ViewAntiAliasing_e getAASetting() const { return aa_setting_; }
     CameraView_e getViewType() const { return view_type_; }
+    float getFov() const { return field_of_view_; }
 
     float getNearPlane() const { return planes_[0]; }
     float getFarPlane() const { return planes_[1]; }

diff --git a/src/Engine/Graphics/OpenGL/Renderer.cpp b/src/Engine/Graphics/OpenGL/Renderer.cpp
@@ -586,7 +586,11 @@ namespace owds {
     glLineWidth(3);
     glm::mat4 model = glm::scale(glm::mat4(1), glm::vec3(0.05, 0.05, 0.05));
     glm::mat4 view = glm::mat4(glm::mat3(render_camera_.getViewMatrix()));
-    glm::mat4 view_translation = glm::translate(glm::mat4(1), glm::vec3(0.75 * (double)screen_.width_ / (double)screen_.height_, -0.75, -1.));
+    double aspect = (double)screen_.width_ / (double)screen_.height_;
+    double trans = tan(render_camera_.getFov() / 2.);
+    double trans_x = trans - 0.05;
+    double trans_y = trans - 0.05 * aspect;
+    glm::mat4 view_translation = glm::translate(glm::mat4(1), glm::vec3(trans_x * aspect, -trans_y, -1.));
     view = view_translation * view;
 
     lines_shader.setMat4("projection", render_camera_.getProjectionMatrix());