Editor use vtx collision

2026-07-10 15:14:33 -04:00 · 2025-02-28 17:31:24 -07:00
parent 08f0d261d1
commit 7a31679c2d
17 changed files with 405 additions and 95 deletions
@@ -0,0 +1,94 @@
+#include "Collision.h"
+
+
+void GenerateCollisionMesh(GameObject& object, Gfx* model) {
+    int8_t opcode;
+    uintptr_t lo;
+    uintptr_t hi;
+
+    Gfx* ptr = model;
+    Vtx* vtx = NULL;
+    size_t i = 0;
+    bool run = true;
+    while (run) {
+        i++;
+        lo = ptr->words.w0;
+        hi = ptr->words.w1;
+        opcode = (EDITOR_GFX_GET_OPCODE(lo) >> 24);
+
+        switch(opcode) {
+            case G_DL:
+                GenerateCollisionMesh(object, (Gfx*)hi);
+                break;
+            case G_VTX:
+                vtx = (Vtx*)ptr->words.w1;
+                break;
+            case G_TRI1: {
+                if (vtx == NULL) {
+                    ptr++;
+                    continue;
+                }
+                uint32_t v1 = ((hi & 0x00FF0000) >> 16) / 2;
+                uint32_t v2 = ((hi & 0x0000FF00) >> 8) / 2;
+                uint32_t v3 = (hi & 0x000000FF) / 2;
+
+                FVector p1 = FVector(vtx[v1].v.ob[0], vtx[v1].v.ob[1], vtx[v1].v.ob[2]);
+                FVector p2 = FVector(vtx[v2].v.ob[0], vtx[v2].v.ob[1], vtx[v2].v.ob[2]);
+                FVector p3 = FVector(vtx[v3].v.ob[0], vtx[v3].v.ob[1], vtx[v3].v.ob[2]);
+
+                object.Triangles.push_back({p1, p2, p3});
+                break;
+            }
+            case G_TRI2: {
+                if (vtx == NULL) {
+                    ptr++;
+                    continue;
+                }
+                uint32_t v1 = ((lo & 0x00FF0000) >> 16) / 2;
+                uint32_t v2 = ((lo & 0x0000FF00) >> 8) / 2;
+                uint32_t v3 = (lo & 0x000000FF) / 2;
+
+                // This is actually triangle 2; vert 1,2,3.
+                uint32_t v4 = ((hi & 0x00FF0000) >> 16) / 2;
+                uint32_t v5 = ((hi & 0x0000FF00) >> 8) / 2;
+                uint32_t v6 = (hi & 0x000000FF) / 2;
+
+                FVector p1 = FVector(vtx[v1].v.ob[0], vtx[v1].v.ob[1], vtx[v1].v.ob[2]);
+                FVector p2 = FVector(vtx[v2].v.ob[0], vtx[v2].v.ob[1], vtx[v2].v.ob[2]);
+                FVector p3 = FVector(vtx[v3].v.ob[0], vtx[v3].v.ob[1], vtx[v3].v.ob[2]);
+
+                FVector p4 = FVector(vtx[v4].v.ob[0], vtx[v4].v.ob[1], vtx[v4].v.ob[2]);
+                FVector p5 = FVector(vtx[v5].v.ob[0], vtx[v5].v.ob[1], vtx[v5].v.ob[2]);
+                FVector p6 = FVector(vtx[v6].v.ob[0], vtx[v6].v.ob[1], vtx[v6].v.ob[2]);
+
+                object.Triangles.push_back({p1, p2, p3});
+                object.Triangles.push_back({p4, p5, p6});
+                break;
+            }
+            case G_QUAD: {
+                if (vtx == NULL) {
+                    ptr++;
+                    continue;
+                }
+                uint32_t v1 = ((hi & 0x00FF0000) >> 16) / 2;
+                uint32_t v2 = ((hi & 0x0000FF00) >> 8) / 2;
+                uint32_t v3 = (hi & 0x000000FF) / 2;
+                uint32_t v4 = ((hi & 0xFF000000) >> 24) / 2;
+
+                FVector p1 = FVector(vtx[v1].v.ob[0], vtx[v1].v.ob[1], vtx[v1].v.ob[2]);
+                FVector p2 = FVector(vtx[v2].v.ob[0], vtx[v2].v.ob[1], vtx[v2].v.ob[2]);
+                FVector p3 = FVector(vtx[v3].v.ob[0], vtx[v3].v.ob[1], vtx[v3].v.ob[2]);
+                FVector p4 = FVector(vtx[v4].v.ob[0], vtx[v4].v.ob[1], vtx[v4].v.ob[2]);
+
+                object.Triangles.push_back({p1, p2, p3});
+                object.Triangles.push_back({p1, p3, p4});
+                break;
+            }
+            case G_ENDDL:
+                run = false;
+                break;
+        }
+
+        ptr++;
+    }
+}