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ParticleSystem:setColors now accepts multiple color arrays (issue #440)

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This commit is contained in:
Alex Szpakowski
2013-03-13 14:38:58 -03:00
parent b8ec6633ab
commit d383434edf
1 changed files with 63 additions and 22 deletions
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src/modules/graphics/opengl/wrap_ParticleSystem.cpp
+63 -22
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@@ -230,35 +230,76 @@ int w_ParticleSystem_setSpinVariation(lua_State *L)
int w_ParticleSystem_setColors(lua_State *L)
{
ParticleSystem *t = luax_checkparticlesystem(L, 1);
int cargs = lua_gettop(L) - 1;
size_t nColors = (cargs + 3) / 4; // nColors = ceil(color_args / 4)
if (cargs % 4 != 0 || cargs == 0)
return luaL_error(L, "Expected red, green, blue, and alpha. Only got %d of 4 components.", cargs % 4);
if (nColors > 8)
return luaL_error(L, "At most eight (8) colors may be used.");
if (lua_istable(L, 2)) // setColors({r,g,b,a}, {r,g,b,a}, ...)
{
size_t nColors = lua_gettop(L) - 1;
if (nColors > 8)
return luaL_error(L, "At most eight (8) colors may be used.");
if (nColors == 1)
{
int r = luaL_checkint(L, 2);
int g = luaL_checkint(L, 3);
int b = luaL_checkint(L, 4);
int a = luaL_checkint(L, 5);
t->setColor(Color(r,g,b,a));
}
else
{
std::vector<Color> colors(nColors);
for (size_t i = 0; i < nColors; ++i)
for (size_t i = 0; i < nColors; i++)
{
int r = luaL_checkint(L, 1 + i*4 + 1);
int g = luaL_checkint(L, 1 + i*4 + 2);
int b = luaL_checkint(L, 1 + i*4 + 3);
int a = luaL_checkint(L, 1 + i*4 + 4);
colors[i] = Color(r,g,b,a);
luaL_checktype(L, i + 2, LUA_TTABLE);
if (lua_objlen(L, i + 2) < 3)
return luaL_argerror(L, i + 2, "expected 4 color components");
for (int j = 0; j < 4; j++)
{
// push args[i+2][j+1] onto the stack
lua_pushnumber(L, j + 1);
lua_gettable(L, i + 2);
}
int r = luaL_checkint(L, -4);
int g = luaL_checkint(L, -3);
int b = luaL_checkint(L, -2);
int a = luaL_optint(L, -1, 255);
// pop the color components from the stack
lua_pop(L, 4);
colors[i] = Color(r, g, b, a);
}
t->setColor(colors);
}
else // setColors(r,g,b,a, r,g,b,a, ...)
{
int cargs = lua_gettop(L) - 1;
size_t nColors = (cargs + 3) / 4; // nColors = ceil(color_args / 4)
if (cargs % 4 != 0 || cargs == 0)
return luaL_error(L, "Expected red, green, blue, and alpha. Only got %d of 4 components.", cargs % 4);
if (nColors > 8)
return luaL_error(L, "At most eight (8) colors may be used.");
if (nColors == 1)
{
int r = luaL_checkint(L, 2);
int g = luaL_checkint(L, 3);
int b = luaL_checkint(L, 4);
int a = luaL_checkint(L, 5);
t->setColor(Color(r,g,b,a));
}
else
{
std::vector<Color> colors(nColors);
for (size_t i = 0; i < nColors; ++i)
{
int r = luaL_checkint(L, 1 + i*4 + 1);
int g = luaL_checkint(L, 1 + i*4 + 2);
int b = luaL_checkint(L, 1 + i*4 + 3);
int a = luaL_checkint(L, 1 + i*4 + 4);
colors[i] = Color(r,g,b,a);
}
t->setColor(colors);
}
}
return 0;
}