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mirror of https://github.com/Nexoniarz/Fry3DX.git synced 2026-11-03 04:24:26 +00:00
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Sculpting: the Paint tab's other side (Tab) — Raise, Puff out, Smooth, Flatten, Pinch, Grab, Ctrl the other way, Shift to smooth, the same on both sides (X); shapes are made finer first (the same shape); o:sculpt() in scripts, fry_sculpt for pictures; tests

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-20 17:24:13 +02:00
commit 5c28e3da4e
9 changed files with 472 additions and 9 deletions
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31
tests/mesh_test.cpp
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@ -4,6 +4,7 @@
#include "image.h"
#include "scene.h"
#include "shapes.h"
#include "sculpt.h"
#include <cmath>
#include <cstdio>
@ -425,6 +426,36 @@ int main() {
const std::string text((std::istreambuf_iterator<char>(j)), {});
CHECK(text.find("\"translation\":[2,3,1]") != std::string::npos, "in glTF's axes (Y up): the position is [2,3,1]");
{ // Sculpting: a cube made finer keeps its shape; brushes move only what's under them.
Mesh m = makeCube(1.0f);
const int times = finerForSculpting(m, 2000);
CHECK(times == 5 && m.verts.size() >= 2000 && closed(m) && boundsMax(m) == glm::vec3(0.5f), "a cube made finer for sculpting: %d times, %zu points, same box", times, m.verts.size());
const SculptMesh sm(m);
const Mesh before = m;
const glm::vec3 top(0, 0, 0.5f);
for (int i = 0; i < 20; ++i) sculptDab(m, sm, SculptBrush::Draw, {top, 0.25f, 1.0f});
CHECK(boundsMax(m).z > 0.55f && boundsMin(m) == boundsMin(before), "draw raises the top (%.3f) and leaves the rest", boundsMax(m).z);
CHECK(closed(m), "still closed after sculpting");
Mesh dug = before;
for (int i = 0; i < 20; ++i) sculptDab(dug, sm, SculptBrush::Draw, {top, 0.25f, 1.0f, true});
CHECK(boundsMax(dug).z == 0.5f, "inverted, it digs in: nothing above the top");
float rough = 0.0f, smooth = 0.0f; // how far the top's points are from flat
Mesh bumpy = m;
for (int i = 0; i < 10; ++i) sculptDab(bumpy, sm, SculptBrush::Smooth, {top, 0.3f, 1.0f});
for (size_t i = 0; i < m.verts.size(); ++i)
if (glm::length(glm::vec2(m.verts[i])) < 0.15f && m.verts[i].z > 0.4f) rough += m.verts[i].z - 0.5f, smooth += bumpy.verts[i].z - 0.5f;
CHECK(smooth < rough, "smoothing lowers the bump (%.3f to %.3f)", rough, smooth);
Mesh flat = m;
for (int i = 0; i < 30; ++i) sculptDab(flat, sm, SculptBrush::Flatten, {top, 0.3f, 1.0f});
CHECK(boundsMax(flat).z < boundsMax(m).z, "flatten presses it down");
Mesh g = before;
const auto held = grabbed(g, top, 0.2f);
std::vector<glm::vec3> from;
for (const auto& [i, w] : held) from.push_back(g.verts[size_t(i)]);
moveGrabbed(g, held, from, glm::vec3(0, 0, 0.3f));
CHECK(!held.empty() && std::abs(boundsMax(g).z - 0.8f) < 0.01f && closed(g), "grab pulls the middle up with it (%.3f)", boundsMax(g).z);
}
std::printf("%s (%d failure%s)\n", g_failures ? "FAILED" : "passed", g_failures, g_failures == 1 ? "" : "s");
return g_failures ? 1 : 0;
}