客户端问题修改

libgr2/CMakeLists.txt

@@ -22,4 +22,8 @@ if(BUILD_TESTING)
     add_executable(libgr2_loader_errors_test tests/loader_errors.cpp)
     target_link_libraries(libgr2_loader_errors_test PRIVATE xrender::libgr2)
     add_test(NAME libgr2.loader_errors COMMAND libgr2_loader_errors_test)
+
+    add_executable(libgr2_animation_test tests/animation.cpp)
+    target_link_libraries(libgr2_animation_test PRIVATE xrender::libgr2)
+    add_test(NAME libgr2.animation COMMAND libgr2_animation_test)
 endif()

libgr2/src/gr2_anim.cpp

@@ -179,7 +179,11 @@ void Curve::eval(float t, float* out) const {
     const int first = (degree == 1) ? (i - 1) : (i - 2);
 
     // 拷本 span 的控制点（越界按端点 clamp），四元数做半球连续化
-    float cp[3 * 4];  // 最多 3 点 × dim4
+    // Metin2 的 ScaleShearCurve 是 9 维；旧的 3*4 缓冲区会在这里发生
+    // 栈溢出（degree=2 时写入 27 个 float），随后被 __stack_chk_fail 终止。
+    // 目前支持的曲线维度为 position=3、orientation=4、scale/shear=9。
+    if (dim > 9) return;
+    float cp[3 * 9];
     for (int s = 0; s < span; ++s) {
         int ci = first + s;
         ci = ci < 0 ? 0 : (ci >= (int)n ? (int)n - 1 : ci);

libgr2/tests/animation.cpp

@@ -0,0 +1,28 @@
+#include <gr2/types.h>
+
+#include <cmath>
+#include <cstdio>
+
+int main() {
+	// ScaleShearCurve uses 9 values per control point. A quadratic span reads
+	// three control points, so this is the regression case for the former 3*4
+	// stack buffer in Curve::eval().
+	gr2::Curve curve;
+	curve.degree = 2;
+	curve.dim = 9;
+	curve.knots = {0.0f, 1.0f, 2.0f};
+	curve.controls.resize(27);
+	for (size_t i = 0; i < curve.controls.size(); ++i) {
+		curve.controls[i] = 1.0f + static_cast<float>(i) * 0.01f;
+	}
+
+	float out[9] = {};
+	curve.eval(0.5f, out);
+	for (float value : out) {
+		if (!std::isfinite(value)) {
+			std::fprintf(stderr, "non-finite 9D curve output\n");
+			return 1;
+		}
+	}
+	return 0;
+}