feat(gameui): implement CSimpleCamera methods

lib/common

@@ -1 +1 @@
-Subproject commit 50b094a8cf37b81837a27a7871b3e671294b1d01
+Subproject commit 56b303bc076539d46fe54f4ee07367b8de294754

lib/typhoon

@@ -1 +1 @@
-Subproject commit dd963fe88344e81d38924d49ef2c3f59e0510eb3
+Subproject commit a4fdad5f6941b02aa93cc0b754b0074872b805d8

src/gameui/camera/CSimpleCamera.cpp

@@ -1,6 +1,87 @@
 #include "CSimpleCamera.hpp"
 
 #include <tempest/rect/CRect.hpp>
+#include <tempest/Math.hpp>
+#include <tempest/matrix/C44Matrix.hpp>
+
+#include "gx/Transform.hpp"
+
+
+static void FaceDirection(const C3Vector& direction, C3Vector* xprime, C3Vector* yprime, C3Vector* zprime) {
+    STORM_ASSERT(!CMath::fequal(direction.SquaredMag(), 0.0));
+
+    *xprime = direction;
+
+    yprime->x = -xprime->y;
+    yprime->y = xprime->x;
+    yprime->z = 0.0f;
+
+    if (yprime->x == 0.0 && yprime->y == 0.0) {
+        yprime->y = 1.1920929e-7f;
+    }
+
+    CMath::normalize(yprime->x, yprime->y);
+
+    zprime->x = -xprime->z * yprime->y;
+    zprime->y = xprime->z * yprime->x;
+    zprime->z = xprime->x * yprime->y - xprime->y * yprime->x;
+}
+
+static void FaceDirectionWithRoll(const C3Vector& direction, const C3Vector& up, C3Vector* xprime, C3Vector* yprime, C3Vector* zprime) {
+    STORM_ASSERT(!CMath::fequal(direction.SquaredMag(), 0.0));
+
+    *xprime = direction;
+
+    float dot = CMath::fabs(C3Vector::Dot(up, *xprime));
+    if (CMath::fequal(dot, 1.0)) {
+        yprime->x = 1.0f;
+        yprime->y = 0.0f;
+        yprime->z = 0.0f;
+    } else {
+        *yprime = C3Vector::Cross(up, *xprime);
+        yprime->Normalize();
+    }
+
+    *zprime = C3Vector::Cross(*xprime, *yprime);
+}
+
+static void BuildBillboardMatrix(const C3Vector& direction, C33Matrix* rotation) {
+    C3Vector xprime;
+    C3Vector yprime;
+    C3Vector zprime;
+    FaceDirection(direction, &xprime, &yprime, &zprime);
+
+    rotation->a0 = xprime.x;
+    rotation->a1 = xprime.y;
+    rotation->a2 = xprime.z;
+
+    rotation->b0 = yprime.x;
+    rotation->b1 = yprime.y;
+    rotation->b2 = yprime.z;
+
+    rotation->c0 = zprime.x;
+    rotation->c1 = zprime.y;
+    rotation->c2 = zprime.z;
+}
+
+static void BuildBillboardMatrixWithRoll(const C3Vector& direction, const C3Vector& up, C33Matrix* rotation) {
+    C3Vector xprime;
+    C3Vector yprime;
+    C3Vector zprime;
+    FaceDirectionWithRoll(direction, up, &xprime, &yprime, &zprime);
+
+    rotation->a0 = xprime.x;
+    rotation->a1 = xprime.y;
+    rotation->a2 = xprime.z;
+
+    rotation->b0 = yprime.x;
+    rotation->b1 = yprime.y;
+    rotation->b2 = yprime.z;
+
+    rotation->c0 = zprime.x;
+    rotation->c1 = zprime.y;
+    rotation->c2 = zprime.z;
+}
 
 CSimpleCamera::CSimpleCamera()
     : m_position()
@@ -49,17 +130,25 @@ C3Vector CSimpleCamera::Up() {
 }
 
 void CSimpleCamera::SetFacing(float yaw, float pitch, float roll) {
-    // TODO
+    this->m_facing.FromEulerAnglesZYX(yaw, pitch, roll);
 }
 
 void CSimpleCamera::SetFacing(const C3Vector& forward, const C3Vector& up) {
-    // TODO
+    BuildBillboardMatrixWithRoll(forward, up, &this->m_facing);
 }
 
 void CSimpleCamera::SetFacing(const C3Vector& forward) {
-    // TODO
+    BuildBillboardMatrix(forward, &this->m_facing);
 }
 
 void CSimpleCamera::SetGxProjectionAndView(const CRect& projectionRect) {
-    // TODO
+    this->m_aspect = (projectionRect.maxX - projectionRect.minX) / (projectionRect.maxY - projectionRect.minY);
+
+    C44Matrix mProj;
+    GxuXformCreateProjection_SG(this->m_fov, this->m_aspect, this->m_nearZ, this->m_farZ, mProj);
+    GxXformSetProjection(mProj);
+
+    C44Matrix mView;
+    GxuXformCreateLookAtSgCompat(C3Vector(), Forward(), Up(), mView);
+    GxXformSetView(mView);
 }

src/gameui/camera/CSimpleCamera.hpp

@@ -19,9 +19,9 @@ class CSimpleCamera {
     float FOV() { this->m_fov; };
     float Aspect() { this->m_aspect; };
 
-    C3Vector Forward();
-    C3Vector Right();
-    C3Vector Up();
+    virtual C3Vector Forward();
+    virtual C3Vector Right();
+    virtual C3Vector Up();
 
     void SetPosition(const C3Vector& position) { this->m_position = position; };
     void SetPosition(float x, float y, float z) { this->m_position = C3Vector(x, y, z); };