diff --git a/res/shaders/4d.vert.glsl b/res/shaders/4d.vert.glsl
index 2e5912c..208c23b 100644
--- a/res/shaders/4d.vert.glsl
+++ b/res/shaders/4d.vert.glsl
@@ -2,39 +2,11 @@
 
 layout(location=1) uniform float time;
 layout(location=2) uniform mat4 proj;
+layout(location=3) uniform mat4 rot;
 
 layout(location=0) in vec4 pos;
 
 void main() {
-    float c2 = cos(time * 0.2);
-    float s2 = sin(time * 0.2);
-    float c3 = cos(time * 0.3);
-    float s3 = sin(time * 0.3);
-    float c4 = cos(time * 0.25);
-    float s4 = sin(time * 0.25);
-
-    mat4 r1 = mat4(
-    c2, -s2, 0.0, 0.0,
-    s2, c2, 0.0, 0.0,
-    0.0, 0.0, 1.0, 0.0,
-    0.0, 0.0, 0.0, 1.0
-    );
-
-    mat4 r2 = mat4(
-    c3, 0.0, -s3, 0.0,
-    0.0, 1.0, 0.0, 0.0,
-    s3, 0.0, c3, 0.0,
-    0.0, 0.0, 0.0, 1.0
-    );
-
-    mat4 r3 = mat4(
-    1.0, 0.0, 0.0, 0.0,
-    0.0, c4, 0.0, -s4,
-    0.0, 0.0, 1.0, 0.0,
-    0.0, s4, 0.0, c4
-    );
-
-    vec4 pos = r2 * r1 * r3 * pos;
-
+    vec4 pos = rot * pos;
     gl_Position = proj * vec4(pos.xyz / (1 - pos.w), 1.0);
 }
diff --git a/res/shaders/main.vert.glsl b/res/shaders/main.vert.glsl
index 898467d..ca74f76 100644
--- a/res/shaders/main.vert.glsl
+++ b/res/shaders/main.vert.glsl
@@ -2,17 +2,12 @@
 
 layout(location=1) uniform float time;
 layout(location=2) uniform mat4 proj;
+layout(location=3) uniform mat4 rot;
 layout(location=0) in vec3 pos;
 
 void main() {
-    float c2 = cos(time * 0.2);
-    float s2 = sin(time * 0.2);
-    float c3 = cos(time * 0.3);
-    float s3 = sin(time * 0.3);
+    mat3 rot3 = mat3(rot);
+    vec3 pos3 = rot3 * pos;
 
-    mat4 r1 = mat4(c2, -s2, 0.0, 0.0, s2, c2, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0);
-
-    mat4 r2 = mat4(c3, 0.0, -s3, 0.0, 0.0, 1.0, 0.0, 0.0, s3, 0.0, c3, 0.0, 0.0, 0.0, 0.0, 1.0);
-
-    gl_Position = proj * r2 * r1 * vec4(pos, 1.0);
+    gl_Position = proj * vec4(pos3, 1.0);
 }
diff --git a/src/main.cpp b/src/main.cpp
index 0dd3c51..c910bd6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -12,10 +12,21 @@
 #include <ml/meshlib_json.hpp>
 
 struct State {
-    float bg[4] = {0.45f, 0.55f, 0.60f, 1.00f};
-    float fg[4] = {0.19f, 0.86f, 0.33f, 1.00f};
+    Eigen::Vector4f bg{0.45f, 0.55f, 0.60f, 1.00f};
+    Eigen::Vector4f fg{0.71f, 0.53f, 0.94f, 1.00f};
+    Eigen::Vector4f wf{0.95f, 0.95f, 0.95f, 1.00f};
+
+    Eigen::Matrix4f rot = Eigen::Matrix4f::Identity();
 };
 
+Eigen::Matrix4f rotor(int u, int v, float rad) {
+    Eigen::Matrix4f res = Eigen::Matrix4f::Identity();
+    res(u, u) = res(v, v) = cosf(rad);
+    res(u, v) = res(v, u) = sinf(rad);
+    res(u, v) *= -1;
+    return res;
+}
+
 void show_overlay(State &state) {
     static std::string gl_vendor = (const char *) glGetString(GL_VENDOR);
     static std::string gl_renderer = (const char *) glGetString(GL_RENDERER);
@@ -24,11 +35,11 @@ void show_overlay(State &state) {
 
     ImGuiWindowFlags window_flags =
         ImGuiWindowFlags_AlwaysAutoResize |
-            ImGuiWindowFlags_NoSavedSettings |
-            ImGuiWindowFlags_NoFocusOnAppearing |
-            ImGuiWindowFlags_NoNav |
-            ImGuiWindowFlags_NoBringToFrontOnFocus |
-            ImGuiWindowFlags_NoMove;
+        ImGuiWindowFlags_NoSavedSettings |
+        ImGuiWindowFlags_NoFocusOnAppearing |
+        ImGuiWindowFlags_NoNav |
+        ImGuiWindowFlags_NoBringToFrontOnFocus |
+        ImGuiWindowFlags_NoMove;
 
     ImGuiStyle &style = ImGui::GetStyle();
     const auto PAD = style.DisplaySafeAreaPadding;
@@ -56,8 +67,31 @@ void show_overlay(State &state) {
 
     ImGui::Separator();
 
-    ImGui::ColorEdit3("Background", state.bg, ImGuiColorEditFlags_Float);
-    ImGui::ColorEdit3("Foreground", state.fg, ImGuiColorEditFlags_Float);
+    ImGui::ColorEdit3("Background", state.bg.data(), ImGuiColorEditFlags_Float);
+    ImGui::ColorEdit3("Foreground", state.fg.data(), ImGuiColorEditFlags_Float);
+    ImGui::ColorEdit3("Wireframe", state.wf.data(), ImGuiColorEditFlags_Float);
+
+    if (io.MouseDown[0] && !io.WantCaptureMouse) {
+        Eigen::Matrix4f rot = Eigen::Matrix4f::Identity();
+        Eigen::Vector2f del{io.MouseDelta.x, io.MouseDelta.y};
+        del /= 200.0f;
+
+        if (io.KeyShift) {
+            del /= 5.0f;
+        }
+
+        if (io.KeyCtrl) {
+            Eigen::Matrix4f rx = rotor(0, 3, -del.x());
+            Eigen::Matrix4f ry = rotor(1, 3, del.y());
+            rot = rx * ry;
+        } else {
+            Eigen::Matrix4f rx = rotor(0, 2, -del.x());
+            Eigen::Matrix4f ry = rotor(1, 2, del.y());
+            rot = rx * ry;
+        }
+
+        state.rot = rot * state.rot;
+    }
 
     ImGui::End();
 }
@@ -239,9 +273,10 @@ int run(GLFWwindow *window, ImGuiContext *context) {
 
         glUseProgram(pgm);
         glBindVertexArray(vao);
-        glUniform4fv(0, 1, state.fg);
+        glUniform4fv(0, 1, state.fg.data());
         glUniform1f(1, (GLfloat) glfwGetTime());
         glUniformMatrix4fv(2, 1, false, proj.data());
+        glUniformMatrix4fv(3, 1, false, state.rot.data());
         glDrawElements(GL_TRIANGLES, (GLsizei) dynamic.cells().size(), GL_UNSIGNED_INT, nullptr);
         glBindVertexArray(0);
         glUseProgram(0);
@@ -251,6 +286,7 @@ int run(GLFWwindow *window, ImGuiContext *context) {
         glUniform4fv(0, 1, state.fg);
         glUniform1f(1, (GLfloat) glfwGetTime());
         glUniformMatrix4fv(2, 1, false, proj.data());
+        glUniformMatrix4fv(3, 1, false, state.rot.data());
         glDrawElements(GL_LINES, (GLsizei) wire_dynamic.cells().size(), GL_UNSIGNED_INT, nullptr);
         glBindVertexArray(0);
         glUseProgram(0);