imported Löve GLES branch (changeset 1ba9037e558b)

jni/love/src/modules/math/wrap_BezierCurve.cpp

@@ -0,0 +1,189 @@
+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#include "common/Exception.h"
+#include "wrap_BezierCurve.h"
+
+#include <cmath>
+
+namespace love
+{
+namespace math
+{
+
+BezierCurve *luax_checkbeziercurve(lua_State *L, int idx)
+{
+	return luax_checktype<BezierCurve>(L, idx, "BezierCurve", MATH_BEZIER_CURVE_T);
+}
+
+int w_BezierCurve_getDegree(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	lua_pushnumber(L, curve->getDegree());
+	return 1;
+}
+
+int w_BezierCurve_getDerivative(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	BezierCurve *deriv = new BezierCurve(curve->getDerivative());
+	luax_pushtype(L, "BezierCurve", MATH_BEZIER_CURVE_T, deriv);
+	return 1;
+}
+
+int w_BezierCurve_getControlPoint(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	int idx = luaL_checkinteger(L, 2);
+
+	if (idx > 0) // 1-indexing
+		idx--;
+
+	EXCEPT_GUARD(
+		Vector v = curve->getControlPoint(idx);
+		lua_pushnumber(L, v.x);
+		lua_pushnumber(L, v.y);
+	)
+
+	return 2;
+}
+
+int w_BezierCurve_setControlPoint(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	int idx = luaL_checkinteger(L, 2);
+	float vx = (float) luaL_checknumber(L, 3);
+	float vy = (float) luaL_checknumber(L, 4);
+
+	if (idx > 0) // 1-indexing
+		idx--;
+
+	EXCEPT_GUARD(curve->setControlPoint(idx, Vector(vx,vy));)
+	return 0;
+}
+
+int w_BezierCurve_insertControlPoint(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	float vx = (float) luaL_checknumber(L, 2);
+	float vy = (float) luaL_checknumber(L, 3);
+	int idx = luaL_optinteger(L, 4, -1);
+
+	if (idx > 0) // 1-indexing
+		idx--;
+
+	EXCEPT_GUARD(curve->insertControlPoint(Vector(vx,vy), idx);)
+	return 0;
+}
+
+int w_BezierCurve_getControlPointCount(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	lua_pushinteger(L, curve->getControlPointCount());
+	return 1;
+}
+
+int w_BezierCurve_translate(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	float dx = (float) luaL_checknumber(L, 2);
+	float dy = (float) luaL_checknumber(L, 3);
+	curve->translate(Vector(dx,dy));
+	return 0;
+}
+
+int w_BezierCurve_rotate(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	double phi = luaL_checknumber(L, 2);
+	float ox = (float) luaL_optnumber(L, 3, 0);
+	float oy = (float) luaL_optnumber(L, 4, 0);
+	curve->rotate(phi, Vector(ox,oy));
+	return 0;
+}
+
+int w_BezierCurve_scale(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	double s = luaL_checknumber(L, 2);
+	float ox = (float) luaL_optnumber(L, 3, 0);
+	float oy = (float) luaL_optnumber(L, 4, 0);
+	curve->scale(s, Vector(ox,oy));
+	return 0;
+}
+
+int w_BezierCurve_evaluate(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	double t = luaL_checknumber(L, 2);
+
+	EXCEPT_GUARD(
+		Vector v = curve->evaluate(t);
+		lua_pushnumber(L, v.x);
+		lua_pushnumber(L, v.y);
+	)
+
+	return 2;
+
+}
+
+int w_BezierCurve_render(lua_State *L)
+{
+	BezierCurve *curve = luax_checkbeziercurve(L, 1);
+	int accuracy = luaL_optinteger(L, 2, 5);
+
+	std::vector<Vector> points;
+	EXCEPT_GUARD(points = curve->render(accuracy);)
+
+	lua_createtable(L, points.size()*2, 0);
+	for (size_t i = 0; i < points.size(); ++i)
+	{
+		lua_pushnumber(L, points[i].x);
+		lua_rawseti(L, -2, 2*i+1);
+		lua_pushnumber(L, points[i].y);
+		lua_rawseti(L, -2, 2*i+2);
+	}
+
+	return 1;
+}
+
+static const luaL_Reg functions[] =
+{
+	{"getDegree", w_BezierCurve_getDegree},
+	{"getDerivative", w_BezierCurve_getDerivative},
+	{"getControlPoint", w_BezierCurve_getControlPoint},
+	{"setControlPoint", w_BezierCurve_setControlPoint},
+	{"insertControlPoint", w_BezierCurve_insertControlPoint},
+	{"getControlPointCount", w_BezierCurve_getControlPointCount},
+	{"translate", w_BezierCurve_translate},
+	{"rotate", w_BezierCurve_rotate},
+	{"scale", w_BezierCurve_scale},
+	{"evaluate", w_BezierCurve_evaluate},
+	{"render", w_BezierCurve_render},
+	{ 0, 0 }
+};
+
+extern "C" int luaopen_beziercurve(lua_State *L)
+{
+	return luax_register_type(L, "BezierCurve", functions);
+}
+
+} // math
+} // love