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feat(editor): add --gen-mesh-scarecrow farm-prop primitive

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54th procedural mesh: 5-box cruciform farm pest deterrent —
vertical body post, horizontal cross arm, head box on top of
the body, brimmed hat box that's wider than the head, and a
narrower-but-taller crown box on top of the hat brim. The
cross silhouette + brimmed-hat read as a scarecrow without
needing rotated geometry.

Useful for crop fields, abandoned villages, harvest set
dressing, ritual circles, fields after a battle. Defaults
to 1.80m body × 1.40m arm span (~2.18m total height).
This commit is contained in:
Kelsi 2026-05-09 09:27:56 -07:00
parent 167d523e70
commit 96bb1f6d04
3 changed files with 130 additions and 0 deletions
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127
tools/editor/cli_gen_mesh.cpp
View file

@ -4655,6 +4655,130 @@ int handleCoffin(int& i, int argc, char** argv) {
return 0;
}
int handleScarecrow(int& i, int argc, char** argv) {
// Scarecrow: 5-box cruciform farm pest deterrent — anchor
// post into the ground, vertical body, horizontal arm cross,
// round-ish head box at the top, and a brimmed hat box on
// the head. The cross silhouette reads as a scarecrow even
// without rotated geometry. The 54th procedural mesh
// primitive — useful for crop fields, abandoned villages,
// harvest set dressing.
std::string womBase = argv[++i];
float bodyHeight = 1.80f;
float armSpan = 1.40f; // total cross-arm width
float postT = 0.06f;
float headSize = 0.22f;
float hatSize = 0.32f;
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { bodyHeight = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { armSpan = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { postT = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { headSize = std::stof(argv[++i]); } catch (...) {}
}
if (i + 1 < argc && argv[i + 1][0] != '-') {
try { hatSize = std::stof(argv[++i]); } catch (...) {}
}
if (bodyHeight <= 0 || armSpan <= 0 || postT <= 0 ||
headSize <= 0 || hatSize <= 0) {
std::fprintf(stderr, "gen-mesh-scarecrow: all dims must be > 0\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;
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);
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*hx, f.du.y*hy, f.du.z*hz);
glm::vec3 dv = glm::vec3(f.dv.x*hx, f.dv.y*hy, f.dv.z*hz);
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});
}
};
// Vertical body post — full bodyHeight.
float halfPost = postT * 0.5f;
float bodyCY = bodyHeight * 0.5f;
addBox(0, bodyCY, 0, halfPost, bodyHeight * 0.5f, halfPost);
// Cross-arm — horizontal, sits about 75% up the body.
float armT = postT * 0.85f;
float halfArmT = armT * 0.5f;
float armCY = bodyHeight * 0.72f;
addBox(0, armCY, 0, armSpan * 0.5f, halfArmT, halfArmT);
// Head — sits on top of the body. Slightly above the post
// tip so it visually sits on the post rather than passing
// through it.
float halfHead = headSize * 0.5f;
float headCY = bodyHeight + halfHead;
addBox(0, headCY, 0, halfHead, halfHead, halfHead);
// Hat — wider than the head (the brim) but shorter
// (so the head still pokes through visually).
float halfHat = hatSize * 0.5f;
float hatH = headSize * 0.40f;
float hatCY = headCY + halfHead - hatH * 0.3f;
addBox(0, hatCY, 0, halfHat, hatH * 0.5f, halfHat);
// Hat crown — taller, narrower top of the hat (so the
// overall hat reads as a brim + crown silhouette).
float crownSize = hatSize * 0.55f;
float crownH = headSize * 0.65f;
float halfCrown = crownSize * 0.5f;
float crownCY = hatCY + hatH * 0.5f + crownH * 0.5f;
addBox(0, crownCY, 0, halfCrown, crownH * 0.5f, halfCrown);
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);
float totalH = crownCY + crownH * 0.5f;
float halfArm = armSpan * 0.5f;
wom.boundMin = glm::vec3(-halfArm, 0.0f, -halfHead);
wom.boundMax = glm::vec3( halfArm, totalH, halfHead);
if (!wowee::pipeline::WoweeModelLoader::save(wom, womBase)) {
std::fprintf(stderr,
"gen-mesh-scarecrow: failed to save %s.wom\n", womBase.c_str());
return 1;
}
std::printf("Wrote %s.wom\n", womBase.c_str());
std::printf(" total H : %.3f\n", totalH);
std::printf(" body : %.3f tall (%.3f square post)\n",
bodyHeight, postT);
std::printf(" arm span : %.3f wide\n", armSpan);
std::printf(" head/hat : %.3f / %.3f\n", headSize, hatSize);
std::printf(" vertices : %zu\n", wom.vertices.size());
std::printf(" triangles : %zu\n", wom.indices.size() / 3);
return 0;
}
int handleWeathervane(int& i, int argc, char** argv) {
// Weathervane: 6-box rooftop wind indicator — base plate,
// tall vertical post, perpendicular N-S and E-W cross arms
@ -6615,6 +6739,9 @@ bool handleGenMesh(int& i, int argc, char** argv, int& outRc) {
if (std::strcmp(argv[i], "--gen-mesh-weathervane") == 0 && i + 1 < argc) {
outRc = handleWeathervane(i, argc, argv); return true;
}
if (std::strcmp(argv[i], "--gen-mesh-scarecrow") == 0 && i + 1 < argc) {
outRc = handleScarecrow(i, argc, argv); return true;
}
return false;
}

2
tools/editor/cli_help.cpp
View file

@ -220,6 +220,8 @@ void printUsage(const char* argv0) {
std::printf(" Beehive (skep): 4 tapered tiers + entrance notch on +Z face (default 0.70/0.85/0.05)\n");
std::printf(" --gen-mesh-weathervane <wom-base> [postH] [postT] [baseSize] [armLen] [arrowLen]\n");
std::printf(" Weathervane: base + post + N-S/E-W cross arms + arrow with tail (default 1.50/0.05/0.30/0.40/0.55)\n");
std::printf(" --gen-mesh-scarecrow <wom-base> [bodyH] [armSpan] [postT] [headSize] [hatSize]\n");
std::printf(" Scarecrow: cruciform body + cross arms + head + brimmed hat (default 1.80/1.40/0.06/0.22/0.32)\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");

1
tools/editor/main.cpp
View file

@ -162,6 +162,7 @@ int main(int argc, char* argv[]) {
"--gen-mesh-mailbox", "--gen-mesh-tombstone", "--gen-mesh-crate",
"--gen-mesh-stool", "--gen-mesh-cauldron", "--gen-mesh-gate",
"--gen-mesh-beehive", "--gen-mesh-weathervane",
"--gen-mesh-scarecrow",
"--gen-texture-gradient",
"--gen-mesh-from-heightmap", "--export-mesh-heightmap",
"--displace-mesh",