camera stuff

src/game/Global.cpp

@@ -5,6 +5,7 @@
 #include "bx/math.h"
 #include <cassert>
 #include <cstdint>
+#include <minwindef.h>
 
 namespace
 {
@@ -33,11 +34,8 @@ void Transform::Translate(bx::Vec3 offset)
 
 void Transform::TranslateLocal(bx::Vec3 offset)
 {
-    UpdateMatrix();
-    float offsetPtr[4]{offset.x, offset.y, offset.z, 0.0f};
-    float localOffset[4]{0.0f};
-    bx::vec4MulMtx(localOffset, offsetPtr, MI.M);
-    Position = bx::add(Position, {localOffset[0], localOffset[1], localOffset[2]});
+    bx::Vec3 localOffset = GlobalToLocalDirection(offset);
+    Position = bx::add(Position, localOffset);
 }
 
 void Transform::Rotate(bx::Vec3 rotation)
@@ -122,3 +120,35 @@ namespace Game
         return reinterpret_cast<void*>(ptrAligned);
     }
 } // namespace Game
+bx::Vec3 Transform::GlobalToLocalDirection(bx::Vec3 global)
+{
+    UpdateMatrix();
+    float in[4]{global.x, global.y, global.z, 0.0f};
+    float out[4]{0.0f};
+    bx::vec4MulMtx(out, in, MI.M);
+    return {out[0], out[1], out[2]};
+}
+bx::Vec3 Transform::GlobalToLocalPoint(bx::Vec3 global)
+{
+    UpdateMatrix();
+    float in[4]{global.x, global.y, global.z, 1.0f};
+    float out[4]{0.0f};
+    bx::vec4MulMtx(out, in, MI.M);
+    return {out[0], out[1], out[2]};
+}
+bx::Vec3 Transform::LocalToGlobalDirection(bx::Vec3 local)
+{
+    UpdateMatrix();
+    float in[4]{local.x, local.y, local.z, 0.0f};
+    float out[4]{0.0f};
+    bx::vec4MulMtx(out, in, M.M);
+    return {out[0], out[1], out[2]};
+}
+bx::Vec3 Transform::LocalToGlobalPoint(bx::Vec3 local)
+{
+    UpdateMatrix();
+    float in[4]{local.x, local.y, local.z, 1.0f};
+    float out[4]{0.0f};
+    bx::vec4MulMtx(out, in, M.M);
+    return {out[0], out[1], out[2]};
+}