Added the ability to spawn particles from Lua

Added particles to football
Increased the object cap for particles

autogen/convert_structs.py

@@ -68,6 +68,7 @@ override_field_immutable = {
     "TextureInfo": [ "*" ],
     "Object": ["oSyncID", "createdThroughNetwork"],
     "GlobalObjectAnimations": [ "*"],
+    "SpawnParticlesInfo": [ "model" ],
 }
 
 sLuaManuallyDefinedStructs = [

autogen/lua_constants/built-in.lua

@@ -81,11 +81,12 @@ function vec3f_mul(dest, a)
 end
 
 function vec3f_normalize(dest)
-    local invsqrt = 1.0 / math.sqrt(dest.x * dest.x + dest.y * dest.y + dest.z * dest.z)
-    if invsqrt == 0 then
+    local divisor = math.sqrt(dest.x * dest.x + dest.y * dest.y + dest.z * dest.z)
+    if divisor == 0 then
         return dest
     end
 
+    local invsqrt = 1.0 / divisor
     dest.x = dest.x * invsqrt
     dest.y = dest.y * invsqrt
     dest.z = dest.z * invsqrt

docs/lua/functions.md

@@ -631,6 +631,7 @@
    - [obj_get_next_with_same_behavior_id](#obj_get_next_with_same_behavior_id)
    - [obj_get_next_with_same_behavior_id_and_field_f32](#obj_get_next_with_same_behavior_id_and_field_f32)
    - [obj_get_next_with_same_behavior_id_and_field_s32](#obj_get_next_with_same_behavior_id_and_field_s32)
+   - [obj_get_temp_spawn_particles_info](#obj_get_temp_spawn_particles_info)
    - [obj_has_behavior_id](#obj_has_behavior_id)
    - [obj_has_model_extended](#obj_has_model_extended)
    - [obj_set_model_extended](#obj_set_model_extended)
@@ -11595,6 +11596,26 @@ The `reliable` field will ensure that the packet arrives, but should be used spa
 
 <br />
 
+## [obj_get_temp_spawn_particles_info](#obj_get_temp_spawn_particles_info)
+
+### Lua Example
+`local SpawnParticlesInfoValue = obj_get_temp_spawn_particles_info(modelId)`
+
+### Parameters
+| Field | Type |
+| ----- | ---- |
+| modelId | [enum ModelExtendedId](constants.md#enum-ModelExtendedId) |
+
+### Returns
+[SpawnParticlesInfo](structs.md#SpawnParticlesInfo)
+
+### C Prototype
+`struct SpawnParticlesInfo* obj_get_temp_spawn_particles_info(enum ModelExtendedId modelId);`
+
+[:arrow_up_small:](#)
+
+<br />
+
 ## [obj_has_behavior_id](#obj_has_behavior_id)
 
 ### Lua Example

docs/lua/structs.md

@@ -1655,7 +1655,7 @@
 | forwardVelBase | `integer` |  |
 | forwardVelRange | `integer` |  |
 | gravity | `integer` |  |
-| model | `integer` |  |
+| model | `integer` | read-only |
 | offsetY | `integer` |  |
 | sizeBase | `number` |  |
 | sizeRange | `number` |  |

mods/football.lua

@@ -163,6 +163,48 @@ define_custom_obj_fields({
     oFrozen = 'u32',
 })
 
+function bhv_ball_particle_trail(obj)
+    local spi = obj_get_temp_spawn_particles_info(E_MODEL_SPARKLES)
+    if spi == nil then
+        return nil
+    end
+
+    spi.behParam = 2
+    spi.count = 1
+    spi.offsetY = -1 * ballRadius
+    spi.forwardVelBase = 8
+    spi.forwardVelRange = 0
+    spi.velYBase = 6
+    spi.velYRange = 0
+    spi.gravity = 0
+    spi.dragStrength = 5
+    spi.sizeBase = 10
+    spi.sizeRange = 30
+
+    cur_obj_spawn_particles(spi)
+end
+
+function bhv_ball_particle_bounce(obj)
+    local spi = obj_get_temp_spawn_particles_info(E_MODEL_MIST)
+    if spi == nil then
+        return nil
+    end
+
+    spi.behParam = 3
+    spi.count = 5
+    spi.offsetY = -1 * ballRadius
+    spi.forwardVelBase = 6
+    spi.forwardVelRange = -6
+    spi.velYBase = 6
+    spi.velYRange = -6
+    spi.gravity = 0
+    spi.dragStrength = 5
+    spi.sizeBase = 8
+    spi.sizeRange = 13
+
+    cur_obj_spawn_particles(spi)
+end
+
 function bhv_ball_init(obj)
     -- flags and such
     obj.oFlags = OBJ_FLAG_UPDATE_GFX_POS_AND_ANGLE
@@ -245,7 +287,9 @@ function bhv_ball_player_collision(obj)
 
     local vDifference = { x = objPoint.x - cylPoint.x, y = objPoint.y - cylPoint.y, z = objPoint.z - cylPoint.z }
     local differenceDir = { x = vDifference.x, y = vDifference.y, z = vDifference.z }
-    vec3f_normalize(differenceDir)
+    if vec3f_length(differenceDir) ~= 0 then
+        vec3f_normalize(differenceDir)
+    end
 
     alterPos.x = (cylPoint.x + differenceDir.x * (playerBallRadius + playerRadius + 1)) - objPoint.x
     alterPos.y = (cylPoint.y + differenceDir.y * (playerBallRadius + playerRadius + 1)) - objPoint.y
@@ -312,6 +356,11 @@ function bhv_ball_player_collision(obj)
         end
     end
 
+    -- make sure player has a velocity
+    if not doReflection and vPlayerMag == 0 then
+        doReflection = true
+    end
+
     --------------------------------------
     -- calculate velocity (interaction) --
     --------------------------------------
@@ -456,8 +505,10 @@ function bhv_ball_loop(obj)
 
     -- detect normal along movement vector
     local vMag = vec3f_length(v)
-    local vNorm = { x = v.x / vMag, y = v.y / vMag, z = v.z / vMag }
-    b = { x = v.x + vNorm.x * (vMag + ballRadius), y = v.y + vNorm.y * (vMag + ballRadius), z = v.z + vNorm.z * (vMag + ballRadius) }
+    if vMag > 0 then
+        local vNorm = { x = v.x / vMag, y = v.y / vMag, z = v.z / vMag }
+        b = { x = v.x + vNorm.x * (vMag + ballRadius), y = v.y + vNorm.y * (vMag + ballRadius), z = v.z + vNorm.z * (vMag + ballRadius) }
+    end
 
     info = collision_find_surface_on_ray(
             a.x, a.y, a.z,
@@ -467,6 +518,7 @@ function bhv_ball_loop(obj)
     local colNormals = {}
     if info.surface ~= nil then
         table.insert(colNormals, { x = info.surface.normal.x, y = info.surface.normal.y, z = info.surface.normal.z })
+        bhv_ball_particle_bounce(obj)
     else
         table.insert(colNormals, nil)
     end
@@ -573,6 +625,16 @@ function bhv_ball_loop(obj)
         network_send_object(obj, false)
     end
 
+    -- spawn a particle trail
+    if vMag > 50 then
+        bhv_ball_particle_trail(obj)
+    end
+
+    -- hack: make sure we never set velocity to nan
+    if obj.oVelX ~= obj.oVelX then obj.oVelX = 0 end
+    if obj.oVelY ~= obj.oVelY then obj.oVelY = 0 end
+    if obj.oVelZ ~= obj.oVelZ then obj.oVelZ = 0 end
+
     -- hack: save pos/vel to detect packets
     cb.oGlobalOwner = obj.oGlobalOwner
     cb.oHitTime = obj.oHitTime

src/game/behaviors/tree_particles.inc.c

@@ -14,7 +14,7 @@ void bhv_tree_snow_or_leaf_loop(void) {
         obj_mark_for_deletion(o);
     if (o->oTimer > 100)
         obj_mark_for_deletion(o);
-    if (gPrevFrameObjectCount > 212)
+    if (gPrevFrameObjectCount > (OBJECT_POOL_CAPACITY * 212 / 240))
         obj_mark_for_deletion(o);
     o->oFaceAnglePitch += o->oAngleVelPitch;
     o->oFaceAngleRoll += o->oAngleVelRoll;

src/game/object_helpers.c

@@ -2238,13 +2238,14 @@ void cur_obj_spawn_particles(struct SpawnParticlesInfo *info) {
     s32 numParticles = info->count;
 
     // If there are a lot of objects already, limit the number of particles
-    if (gPrevFrameObjectCount > 150 && numParticles > 10) {
+    if (gPrevFrameObjectCount > (OBJECT_POOL_CAPACITY * 150 / 240) && numParticles > 10) {
         numParticles = 10;
     }
+    
 
     // We're close to running out of object slots, so don't spawn particles at
     // all
-    if (gPrevFrameObjectCount > 210) {
+    if (gPrevFrameObjectCount > (OBJECT_POOL_CAPACITY * 210 / 240)) {
         numParticles = 0;
     }
 

src/pc/lua/smlua_cobject_autogen.c

@@ -1439,7 +1439,7 @@ static struct LuaObjectField sSpawnParticlesInfoFields[LUA_SPAWN_PARTICLES_INFO_
     { "forwardVelBase",  LVT_S8,  offsetof(struct SpawnParticlesInfo, forwardVelBase),  false, LOT_NONE },
     { "forwardVelRange", LVT_S8,  offsetof(struct SpawnParticlesInfo, forwardVelRange), false, LOT_NONE },
     { "gravity",         LVT_S8,  offsetof(struct SpawnParticlesInfo, gravity),         false, LOT_NONE },
-    { "model",           LVT_U8,  offsetof(struct SpawnParticlesInfo, model),           false, LOT_NONE },
+    { "model",           LVT_U8,  offsetof(struct SpawnParticlesInfo, model),           true,  LOT_NONE },
     { "offsetY",         LVT_S8,  offsetof(struct SpawnParticlesInfo, offsetY),         false, LOT_NONE },
     { "sizeBase",        LVT_F32, offsetof(struct SpawnParticlesInfo, sizeBase),        false, LOT_NONE },
     { "sizeRange",       LVT_F32, offsetof(struct SpawnParticlesInfo, sizeRange),       false, LOT_NONE },

src/pc/lua/smlua_constants_autogen.c

@@ -73,10 +73,11 @@ char gSmluaConstants[] = ""
 "    return dest\n"
 "end\n"
 "function vec3f_normalize(dest)\n"
-"    local invsqrt = 1.0 / math.sqrt(dest.x * dest.x + dest.y * dest.y + dest.z * dest.z)\n"
-"    if invsqrt == 0 then\n"
+"    local divisor = math.sqrt(dest.x * dest.x + dest.y * dest.y + dest.z * dest.z)\n"
+"    if divisor == 0 then\n"
 "        return dest\n"
 "    end\n"
+"    local invsqrt = 1.0 / divisor\n"
 "    dest.x = dest.x * invsqrt\n"
 "    dest.y = dest.y * invsqrt\n"
 "    dest.z = dest.z * invsqrt\n"

src/pc/lua/smlua_functions_autogen.c

@@ -7397,6 +7397,17 @@ int smlua_func_obj_get_next_with_same_behavior_id_and_field_s32(lua_State* L) {
     return 1;
 }
 
+int smlua_func_obj_get_temp_spawn_particles_info(lua_State* L) {
+    if(!smlua_functions_valid_param_count(L, 1)) { return 0; }
+
+    int modelId = smlua_to_integer(L, 1);
+    if (!gSmLuaConvertSuccess) { return 0; }
+
+    smlua_push_object(L, LOT_SPAWNPARTICLESINFO, obj_get_temp_spawn_particles_info(modelId));
+
+    return 1;
+}
+
 int smlua_func_obj_has_behavior_id(lua_State* L) {
     if(!smlua_functions_valid_param_count(L, 2)) { return 0; }
 
@@ -8519,6 +8530,7 @@ void smlua_bind_functions_autogen(void) {
     smlua_bind_function(L, "obj_get_next_with_same_behavior_id", smlua_func_obj_get_next_with_same_behavior_id);
     smlua_bind_function(L, "obj_get_next_with_same_behavior_id_and_field_f32", smlua_func_obj_get_next_with_same_behavior_id_and_field_f32);
     smlua_bind_function(L, "obj_get_next_with_same_behavior_id_and_field_s32", smlua_func_obj_get_next_with_same_behavior_id_and_field_s32);
+    smlua_bind_function(L, "obj_get_temp_spawn_particles_info", smlua_func_obj_get_temp_spawn_particles_info);
     smlua_bind_function(L, "obj_has_behavior_id", smlua_func_obj_has_behavior_id);
     smlua_bind_function(L, "obj_has_model_extended", smlua_func_obj_has_model_extended);
     smlua_bind_function(L, "obj_set_model_extended", smlua_func_obj_set_model_extended);

src/pc/lua/smlua_obj_utils.c

@@ -190,3 +190,16 @@ struct Object *obj_get_next_with_same_behavior_id_and_field_f32(struct Object *o
     }
     return NULL;
 }
+
+struct SpawnParticlesInfo* obj_get_temp_spawn_particles_info(enum ModelExtendedId modelId) {
+    static struct SpawnParticlesInfo spi = { 0 };
+
+    u8 loadedModelId = smlua_model_util_load(modelId);
+    if (loadedModelId == 0xFF) {
+        LOG_ERROR("failed to load model  %u", modelId);
+        return NULL;
+    }
+    spi.model = loadedModelId;
+
+    return &spi;
+}

src/pc/lua/smlua_obj_utils.h

@@ -28,4 +28,8 @@ struct Object *obj_get_next_with_same_behavior_id(struct Object *o);
 struct Object *obj_get_next_with_same_behavior_id_and_field_s32(struct Object *o, s32 fieldIndex, s32 value);
 struct Object *obj_get_next_with_same_behavior_id_and_field_f32(struct Object *o, s32 fieldIndex, f32 value);
 
+// misc obj helpers
+
+struct SpawnParticlesInfo* obj_get_temp_spawn_particles_info(enum ModelExtendedId modelId);
+
 #endif

src/pc/network/discord/user.c

@@ -5,8 +5,10 @@
 
 static void on_current_user_update(UNUSED void* data) {
     LOGFILE_INFO(LFT_DISCORD, "> on_current_user_update");
-    struct DiscordUser user;
+    struct DiscordUser user = { 0 };
     app.users->get_current_user(app.users, &user);
+
+    // remember user id
     app.userId = user.id;
     gPcDebug.id = user.id;