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Added delta timestep to 2d simulation

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This commit is contained in:
n00b
2024-12-01 00:15:41 -05:00
parent f008cf839b
commit cfad58b99c
12 changed files with 1083 additions and 537 deletions
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4
rcbasic_runtime/main.cpp
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@@ -4446,8 +4446,8 @@ int main(int argc, char * argv[])
std::cin >> debug_opt;
if(debug_opt.compare("a")==0)
{
rc_intern_dirChange("/home/n00b/projects/bu/rcbasic_v400a5_linux/test_project_v4a5");
rc_filename = "test.cbc";
rc_intern_dirChange("/home/n00b/projects/rcbasic_alpha3/test_project");
rc_filename = "main.cbc";
}
else
{

7
rcbasic_runtime/rc_gfx.h
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@@ -946,7 +946,8 @@ int rc_canvasOpen(int w, int h, int vx, int vy, int vw, int vh, int mode, int ca
{
b2Vec2 gravity(0, 0);
canvas.physics2D.world = new b2World(gravity);
canvas.physics2D.timeStep = 1/60.0; //the length of time passed to simulate (seconds)
canvas.physics2D.timeStep = -1; //the length of time passed to simulate (seconds)
canvas.physics2D.time_stamp = SDL_GetTicks();
canvas.physics2D.velocityIterations = 8; //how strongly to correct velocity
canvas.physics2D.positionIterations = 3; //how strongly to correct position
canvas.physics2D.enabled = true;
@@ -3056,7 +3057,9 @@ void rc_preUpdate()
if(rc_canvas[i].type != RC_CANVAS_TYPE_SPRITE)
continue;
float step = rc_canvas[i].physics2D.timeStep;
Uint32 delta_time = SDL_GetTicks() - rc_canvas[i].physics2D.time_stamp;
rc_canvas[i].physics2D.time_stamp = SDL_GetTicks();
float step = rc_canvas[i].physics2D.timeStep < 0 ? (delta_time*0.001f) : rc_canvas[i].physics2D.timeStep;
int32 velocityIterations = rc_canvas[i].physics2D.velocityIterations;
int32 positionIterations = rc_canvas[i].physics2D.positionIterations;

2
rcbasic_runtime/rc_gfx_core.h
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@@ -307,7 +307,7 @@ struct rc_physicsWorld2D_obj
b2World* world;
rc_contactListener_obj* contact_listener;
float time_stamp;
Uint32 time_stamp;
float timeStep = 1/60.0; //the length of time passed to simulate (seconds)
int velocityIterations = 8; //how strongly to correct velocity
int positionIterations = 3; //how strongly to correct position

4
rcbasic_runtime/rc_spritelib.h
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@@ -804,7 +804,9 @@ bool rc_spriteIsVisible(int spr_id)
//This function is called on each canvas on update
void drawSprites(int canvas_id)
{
float step = rc_canvas[canvas_id].physics2D.timeStep;
Uint32 delta_time = SDL_GetTicks() - rc_canvas[canvas_id].physics2D.time_stamp;
rc_canvas[canvas_id].physics2D.time_stamp = SDL_GetTicks();
float step = rc_canvas[canvas_id].physics2D.timeStep < 0 ? (delta_time*0.001f) : rc_canvas[canvas_id].physics2D.timeStep;
int32 velocityIterations = rc_canvas[canvas_id].physics2D.velocityIterations;
int32 positionIterations = rc_canvas[canvas_id].physics2D.positionIterations;

8
rcbasic_runtime/rcbasic_runtime.depend
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@@ -1,5 +1,5 @@
# depslib dependency file v1.0
1733023264 source:/home/n00b/Projects/RCBASIC4/rcbasic_runtime/main.cpp
1733028476 source:/home/n00b/Projects/RCBASIC4/rcbasic_runtime/main.cpp
"rc_os_defines.h"
<emscripten.h>
<sys/param.h>
@@ -1247,7 +1247,7 @@
1727545973 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/RealisticWater.h
<irrlicht.h>
1733027113 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/rc_gfx.h
1733028476 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/rc_gfx.h
"SDL.h"
<SDL2/SDL.h>
<irrlicht.h>
@@ -1271,7 +1271,7 @@
"rc_joints.h"
<irrtheora.h>
1733027113 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/rc_gfx_core.h
1733028476 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/rc_gfx_core.h
"SDL.h"
"btBulletDynamicsCommon.h"
"BulletSoftBody/btSoftRigidDynamicsWorld.h"
@@ -2487,7 +2487,7 @@
<irrlicht.h>
<cmath>
1731722537 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/rc_spritelib.h
1733028518 /home/n00b/Projects/RCBASIC4/rcbasic_runtime/rc_spritelib.h
"SDL.h"
<SDL2/SDL.h>
"rc_sprite2D.h"