External camera interface

Engine/Graphics/3DRenderer.cpp

@@ -46,6 +46,27 @@ Graphic3DRenderer::Graphic3DRenderer() {
 
 Graphic3DRenderer::~Graphic3DRenderer() {}
 
+void Graphic3DRenderer::UpdateCamera(CAMERA_MOVE type, const float value) {
+    switch (type) {
+    case CAMERA_MOVE_WALK:
+        mMainCamera->Walk(value);
+        break;
+
+    case CAMERA_MOVE_STRAFE:
+        mMainCamera->Strafe(value);
+        break;
+
+    case CAMERA_MOVE_FLY:
+        mMainCamera->Fly(value);
+        break;
+    
+    default:
+        break;
+    }
+
+    mMainCamera->UpdateCamView();
+}
+
 void Graphic3DRenderer::Draw(sf::RenderTexture& context) {
     sf::BlendMode sBM = sf::BlendNone;
     sf::RenderStates sRS(sBM);

Engine/Graphics/3DRenderer.hpp

@@ -7,6 +7,12 @@
 #include "../World/WorldObject.hpp"
 
 
+typedef enum eCameraMovementType {
+    CAMERA_MOVE_WALK,
+    CAMERA_MOVE_STRAFE,
+    CAMERA_MOVE_FLY
+} CAMERA_MOVE;
+
 class Graphic3DRenderer final {
 public:
     Graphic3DRenderer();
@@ -17,6 +23,7 @@ public:
     Graphic3DRenderer(Graphic3DRenderer const&) = delete;
     Graphic3DRenderer& operator= (Graphic3DRenderer const&) = delete;
 
+    void UpdateCamera(CAMERA_MOVE type, const float value);
     void Draw(sf::RenderTexture& context);
 
 private:

Engine/Graphics/Camera.cpp

@@ -36,4 +36,28 @@ void Camera::LookAt(const M3D_F3& pos, const M3D_F3& target, const M3D_F3& up) {
 	M3D_VECTOR U = M3D_V4LoadF3(&up);
 
 	LookAt(P, T, U);
+}
+
+void Camera::Strafe(float d) {
+	// mPosition += d*mRight
+	M3D_VECTOR s = M3D_V4Replicate(d);
+	M3D_VECTOR r = M3D_V4LoadF3(&mRight);
+	M3D_VECTOR p = M3D_V4LoadF3(&mPos);
+	M3D_V4StoreF3(&mPos, M3D_V4MultiplyAdd(s, r, p));
+}
+
+void Camera::Walk(float d) {
+	// mPosition += d*mLook
+	M3D_VECTOR s = M3D_V4Replicate(d);
+	M3D_VECTOR l = M3D_V4LoadF3(&mLook);
+	M3D_VECTOR p = M3D_V4LoadF3(&mPos);
+	M3D_V4StoreF3(&mPos, M3D_V4MultiplyAdd(s, l, p));
+}
+
+void Camera::Fly(float d) {
+	// mPosition += d*mRight
+	M3D_VECTOR s = M3D_V4Replicate(d);
+	M3D_VECTOR u = M3D_V4LoadF3(&mUp);
+	M3D_VECTOR p = M3D_V4LoadF3(&mPos);
+	M3D_V4StoreF3(&mPos, M3D_V4MultiplyAdd(s, u, p));
 }

Engine/Graphics/Camera.hpp

@@ -28,6 +28,10 @@ public:
     void LookAt(M3D_VECTOR pos, M3D_VECTOR target, M3D_VECTOR worldUp);
     void LookAt(const M3D_F3& pos, const M3D_F3& target, const M3D_F3& up);
 
+    void Strafe(float d);
+    void Walk(float d);
+    void Fly(float d);
+
 private:
     M3D_F4X4 mProjMat = M3D_MIdentity4x4();
     M3D_F4X4 mViewMat = M3D_MIdentity4x4();