Added collision model code.

2026-08-09 01:29:43 -07:00
parent 1b718f17f6
commit a7fdbe32ad
31 changed files with 13317 additions and 224 deletions
@@ -0,0 +1,45 @@
+#pragma once
+
+#include "cm/collisiontypes.h"
+#include "cm/jobs/polygonmodel/polygonmodel_inline.h"
+
+inline int CM_EdgeIndex(const std::uint16_t edgeReference) {
+    return edgeReference & 0x7FFF;
+}
+
+inline int CM_EdgeStartVertex(const cm_edge_t& edge,
+    const std::uint16_t edgeReference) {
+    return edge.vertexNum[edgeReference >> 15];
+}
+
+inline int CM_EdgeEndVertex(const cm_edge_t& edge,
+    const std::uint16_t edgeReference) {
+    return edge.vertexNum[(edgeReference >> 15) ^ 1];
+}
+
+// Recovered from engine/cm/jobs/polygonmodel/polygonmodeldata.h.
+inline void CM_GetPolygonPlane(const cm_subModelPtrs_t& subModel,
+    const cm_polygon_t& polygon, idPlane& plane) {
+    const std::uint16_t firstReference =
+        subModel.polygonEdges[polygon.firstEdge];
+    const std::uint16_t secondReference =
+        subModel.polygonEdges[polygon.firstEdge + 1];
+    const cm_edge_t& firstEdge =
+        subModel.edges[CM_EdgeIndex(firstReference)];
+    const cm_edge_t& secondEdge =
+        subModel.edges[CM_EdgeIndex(secondReference)];
+    const idVec3& firstPoint =
+        subModel.vertices[CM_EdgeStartVertex(firstEdge, firstReference)].p;
+    const idVec3& sharedPoint =
+        subModel.vertices[CM_EdgeStartVertex(secondEdge, secondReference)].p;
+    const idVec3& secondPoint =
+        subModel.vertices[CM_EdgeEndVertex(secondEdge, secondReference)].p;
+
+    idVec3 normal = (secondPoint - sharedPoint).Cross(
+        firstPoint - sharedPoint);
+    normal.NormalizeFast();
+    plane.a = normal.x;
+    plane.b = normal.y;
+    plane.c = normal.z;
+    plane.d = -normal.Dot(sharedPoint);
+}