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feat(editor): add --gen-mesh-portal doorway frame primitive

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Procedural doorway: two vertical post boxes plus a horizontal
lintel box across the top. Posts run along the Z axis (so
width spans Z), the opening faces +X. Pass lintelHeight=0
to skip the lintel for two free-standing posts.

Defaults: 2.5w × 4h, post thickness 0.4, lintel 0.5. Useful
for entrances, gates, magical portals, ruins, walls. Brings
the procedural mesh primitive set to 24.
This commit is contained in:
Kelsi 2026-05-08 14:42:56 -07:00
parent 31fa590c9d
commit 28b02a31ac
1 changed files with 113 additions and 1 deletions
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114
tools/editor/main.cpp
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@ -599,6 +599,8 @@ static void printUsage(const char* argv0) {
std::printf(" Humanoid placeholder: pedestal block + tall body cylinder + head sphere\n");
std::printf(" --gen-mesh-altar <wom-base> [topRadius] [topHeight] [steps] [stepStride]\n");
std::printf(" Round altar: stacked stepped discs descending from a flat top (default 3 steps)\n");
std::printf(" --gen-mesh-portal <wom-base> [width] [height] [postThickness] [lintelHeight]\n");
std::printf(" Doorway frame: two side posts + top lintel (default 2.5w × 4h)\n");
std::printf(" Procedural tree: cylindrical trunk + spherical foliage (default 0.1/2.0/0.7)\n");
std::printf(" --displace-mesh <wom-base> <heightmap.png> [scale]\n");
std::printf(" Offset each vertex along its normal by heightmap brightness × scale (default 1.0)\n");
@ -1131,7 +1133,7 @@ int main(int argc, char* argv[]) {
"--gen-mesh-pyramid", "--gen-mesh-fence", "--gen-mesh-tree",
"--gen-mesh-rock", "--gen-mesh-pillar", "--gen-mesh-bridge",
"--gen-mesh-tower", "--gen-mesh-house", "--gen-mesh-fountain",
"--gen-mesh-statue", "--gen-mesh-altar",
"--gen-mesh-statue", "--gen-mesh-altar", "--gen-mesh-portal",
"--gen-texture-gradient",
"--gen-mesh-from-heightmap", "--export-mesh-heightmap",
"--displace-mesh",
@ -23968,6 +23970,116 @@ int main(int argc, char* argv[]) {
std::printf(" vertices : %zu\n", wom.vertices.size());
std::printf(" triangles: %zu\n", wom.indices.size() / 3);
return 0;
} else if (std::strcmp(argv[i], "--gen-mesh-portal") == 0 && i + 1 < argc) {
// Doorway portal: two vertical post boxes plus a
// horizontal lintel box across the top. Posts run along
// the Z axis (so width spans Z), opening faces +X. The
// gap between the posts is the actual doorway. Useful
// for entrances, gates, magical portals, ruins.
//
// The 24th procedural mesh primitive.
std::string womBase = argv[++i];
float width = 2.5f; // outer-to-outer along Z
float height = 4.0f; // total Y
float postThick = 0.4f; // post width in X and Z
float lintelH = 0.5f; // top lintel height (Y)
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { width = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { height = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { postThick = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { lintelH = std::stof(argv[++i]); } catch (...) {}
}
if (width <= 0 || height <= 0 || postThick <= 0 ||
lintelH < 0 || postThick * 2 >= width ||
lintelH > height) {
std::fprintf(stderr,
"gen-mesh-portal: posts must fit inside width; lintel <= height\n");
return 1;
}
if (womBase.size() >= 4 &&
womBase.substr(womBase.size() - 4) == ".wom") {
womBase = womBase.substr(0, womBase.size() - 4);
}
wowee::pipeline::WoweeModel wom;
wom.name = std::filesystem::path(womBase).stem().string();
wom.version = 3;
// Box helper — same pattern as other multi-box meshes.
auto addBox = [&](float cx, float cy, float cz,
float hx, float hy, float hz) {
struct Face { glm::vec3 n, du, dv; };
Face faces[6] = {
{{0, 1, 0}, {1, 0, 0}, {0, 0, 1}},
{{0,-1, 0}, {1, 0, 0}, {0, 0,-1}},
{{1, 0, 0}, {0, 0, 1}, {0, 1, 0}},
{{-1,0, 0}, {0, 0,-1}, {0, 1, 0}},
{{0, 0, 1}, {-1,0, 0}, {0, 1, 0}},
{{0, 0,-1}, {1, 0, 0}, {0, 1, 0}},
};
glm::vec3 c(cx, cy, cz);
glm::vec3 ext(hx, hy, hz);
for (const Face& f : faces) {
glm::vec3 center = c + glm::vec3(f.n.x*hx, f.n.y*hy, f.n.z*hz);
glm::vec3 du = glm::vec3(f.du.x*ext.x, f.du.y*ext.y, f.du.z*ext.z);
glm::vec3 dv = glm::vec3(f.dv.x*ext.x, f.dv.y*ext.y, f.dv.z*ext.z);
uint32_t base = static_cast<uint32_t>(wom.vertices.size());
auto push = [&](glm::vec3 p, float u, float v) {
wowee::pipeline::WoweeModel::Vertex vtx;
vtx.position = p;
vtx.normal = f.n;
vtx.texCoord = {u, v};
wom.vertices.push_back(vtx);
};
push(center - du - dv, 0, 0);
push(center + du - dv, 1, 0);
push(center + du + dv, 1, 1);
push(center - du + dv, 0, 1);
wom.indices.insert(wom.indices.end(),
{base, base + 1, base + 2, base, base + 2, base + 3});
}
};
// Two posts at z = ±(width/2 - postThick/2). Each
// post extends from y=0 to y=height-lintelH so it
// tucks under the lintel.
float postY = (height - lintelH) * 0.5f;
float postHy = (height - lintelH) * 0.5f;
float postZ = (width - postThick) * 0.5f;
float postHt = postThick * 0.5f;
addBox(0, postY, postZ, postHt, postHy, postHt);
addBox(0, postY, -postZ, postHt, postHy, postHt);
// Lintel: spans full width across the top, same X
// thickness as posts.
if (lintelH > 0.0f) {
float lintelY = height - lintelH * 0.5f;
addBox(0, lintelY, 0,
postHt, lintelH * 0.5f, width * 0.5f);
}
wowee::pipeline::WoweeModel::Batch batch;
batch.indexStart = 0;
batch.indexCount = static_cast<uint32_t>(wom.indices.size());
batch.textureIndex = 0;
wom.batches.push_back(batch);
wom.boundMin = glm::vec3(-postHt, 0, -width * 0.5f);
wom.boundMax = glm::vec3( postHt, height, width * 0.5f);
if (!wowee::pipeline::WoweeModelLoader::save(wom, womBase)) {
std::fprintf(stderr,
"gen-mesh-portal: failed to save %s.wom\n", womBase.c_str());
return 1;
}
std::printf("Wrote %s.wom\n", womBase.c_str());
std::printf(" width : %.3f\n", width);
std::printf(" height : %.3f\n", height);
std::printf(" post thick : %.3f\n", postThick);
std::printf(" lintel H : %.3f%s\n", lintelH,
lintelH > 0 ? "" : " (no lintel)");
std::printf(" vertices : %zu\n", wom.vertices.size());
std::printf(" triangles : %zu\n", wom.indices.size() / 3);
return 0;
} else if (std::strcmp(argv[i], "--displace-mesh") == 0 && i + 2 < argc) {
// Displaces each vertex along its current normal by the
// heightmap brightness × scale. UVs determine where each