New element: GRVT (gravitons), energy particle that creates Newtonian…

… Gravity

src/simulation/Simulation.cpp

@@ -2054,7 +2054,10 @@ void Simulation::init_can_move()
 		 || destinationType == PT_H2)
 			can_move[PT_PHOT][destinationType] = 2;
 		if (destinationType != PT_DMND && destinationType != PT_INSL && destinationType != PT_VOID && destinationType != PT_PVOD && destinationType != PT_VIBR && destinationType != PT_PRTI && destinationType != PT_PRTO)
+		{
 			can_move[PT_PROT][destinationType] = 2;
+			can_move[PT_GRVT][destinationType] = 2;
+		}
 	}
 
 	//other special cases that weren't covered above
@@ -3048,6 +3051,15 @@ int Simulation::create_part(int p, int x, int y, int tv)
 				parts[i].vy = 2.0f*sinf(a);
 				break;
 			}
+			case PT_GRVT:
+			{
+				float a = (rand()%360)*3.14159f/180.0f;
+				parts[i].life = 250 + rand()%200;
+				parts[i].vx = 2.0f*cosf(a);
+				parts[i].vy = 2.0f*sinf(a);
+				parts[i].tmp = 7;
+				break;
+			}
 			case PT_TRON:
 			{
 				int randhue = rand()%360;

src/simulation/elements/GVRT.cpp

@@ -0,0 +1,74 @@
+#include "simulation/Elements.h"
+//#TPT-Directive ElementClass Element_GRVT PT_GRVT 177
+Element_GRVT::Element_GRVT()
+{
+	Identifier = "DEFAULT_PT_GRVT";
+	Name = "GRVT";
+	Colour = PIXPACK(0x00EE76);
+	MenuVisible = 1;
+	MenuSection = SC_NUCLEAR;
+	Enabled = 1;
+
+	Advection = 0.0f;
+	AirDrag = 0.00f * CFDS;
+	AirLoss = 1.00f;
+	Loss = 1.00f;
+	Collision = -.99f;
+	Gravity = 0.0f;
+	Diffusion = 0.00f;
+	HotAir = 0.000f * CFDS;
+	Falldown = 0;
+
+	Flammable = 40;
+	Explosive = 0;
+	Meltable = 0;
+	Hardness = 1;
+
+	Weight = -1;
+
+	Temperature = R_TEMP+273.15f;
+	HeatConduct = 61;
+	Description = "Gravitons. Create Newtonian Gravity.";
+
+	State = ST_GAS;
+	Properties = TYPE_ENERGY|PROP_LIFE_DEC|PROP_LIFE_KILL_DEC;
+
+	LowPressure = IPL;
+	LowPressureTransition = NT;
+	HighPressure = IPH;
+	HighPressureTransition = NT;
+	LowTemperature = ITL;
+	LowTemperatureTransition = NT;
+	HighTemperature = ITH;
+	HighTemperatureTransition = NT;
+
+	Update = &Element_GRVT::update;
+	Graphics = &Element_GRVT::graphics;
+}
+
+//#TPT-Directive ElementHeader Element_GRVT static int update(UPDATE_FUNC_ARGS)
+int Element_GRVT::update(UPDATE_FUNC_ARGS)
+{
+	//at higher tmps they just go completely insane
+	if (parts[i].tmp >= 100)
+		parts[i].tmp = 100;
+	if (parts[i].tmp <= -100)
+		parts[i].tmp = -100;
+
+	sim->gravmap[(y/CELL)*(XRES/CELL)+(x/CELL)] = 0.2f*parts[i].tmp;
+	return 0;
+}
+
+//#TPT-Directive ElementHeader Element_GRVT static int graphics(GRAPHICS_FUNC_ARGS)
+int Element_GRVT::graphics(GRAPHICS_FUNC_ARGS)
+{
+	*firea = 5;
+	*firer = 0;
+	*fireg = 250;
+	*fireb = 170;
+
+	*pixel_mode |= FIRE_BLEND;
+	return 1;
+}
+
+Element_GRVT::~Element_GRVT() {}