1 files changed, 33 insertions, 0 deletions
diff --git a/src/d/d_area.cpp b/src/d/d_area.cpp
new file mode 100644
index 00000000..6e9929fa
--- /dev/null
+++ b/src/d/d_area.cpp
@@ -0,0 +1,33 @@
+#include "d/d_area.h"
+
+#include "common.h"
+#include "m/m_mtx.h"
+#include "m/m_vec.h"
+#include "rvl/MTX/mtx.h"
+
+void dArea_c::set(const mVec3_c &position, const mAng rotY, const mVec3_c &scale, mMtx_c *pSrc, f32 scaleTerm) {
+    mMtx_c src;
+    if (pSrc == nullptr) {
+        pSrc = &src;
+    }
+    pSrc->transS(position.x, position.y + scale.y * 0.5f, position.z);
+    pSrc->YrotM(rotY);
+    pSrc->scaleM(scale.x + scaleTerm, scale.y + scaleTerm, scale.z + scaleTerm);
+    mArea.copyFrom(*pSrc);
+    MTXInverse(mArea, mArea);
+}
+
+bool dArea_c::checkAreaBox(const mVec3_c &position) {
+    mVec3_c pos;
+    mArea.multVec(position, pos);
+    return (-0.5f <= pos.x && pos.x <= 0.5f) && //
+           (-0.5f <= pos.y && pos.y <= 0.5f) && //
+           (-0.5f <= pos.z && pos.z <= 0.5f);
+}
+
+bool dArea_c::checkAreaCyl(const mVec3_c &position) {
+    mVec3_c pos;
+    mArea.multVec(position, pos);
+    return (-0.5f <= pos.y && pos.y <= 0.5f) && //
+           pos.squareMagXZ() <= 1.0f;
+}