Add information about upgrade part handling calculation

swep1rcr.exe/handling.h

@@ -0,0 +1,24 @@
+typedef struct {
+  float AntiSkid; // 0
+  float TurnResponse; // 4
+  float MaxTurnRate; // 8
+  float Acceleration; // 12
+  float MaxSpeed; // 16
+  float AirbrakeInv; // 20
+  float DecelInv; // 24
+  float BoostThrust; // 28
+  float HeatRate; // 32
+  float CoolRate; // 36
+  float HoverHeight; // 40
+  float RepairRate; // 44
+  float BumpMass; // 48
+  float DmgImmunity; // 52
+} PACKED PodracerHandlingData;
+
+// This is the format used for storing information in the binary.
+// At load time, IsectRadius is shifted back by 4 additional bytes.
+// So it is seperated here so we can re-use PodracerHandlingData.
+typedef struct {
+  PodracerHandlingData
+  float IsectRadius; // 56
+} PACKED PodracerHandlingTableData;

swep1rcr.exe/upgrades.c

@@ -0,0 +1,162 @@
+/* Information related to podracer upgrades */
+
+// Research based on patched US version
+
+#include "handling.h"
+
+typedef struct {
+  uint8_t index; // absolute index to identify part?
+  uint8_t level; // level / quality?
+  uint8_t unk1; // ?
+  uint8_t category; // what kind of part it is?
+  int32_t price;
+  int32_t model; // model index
+  char* title;
+} PartData;
+
+PartData data_4C1CB8[7 * 6]; // 7 categories x 6 levels
+
+
+
+//----- (004493F0) --------------------------------------------------------
+// Calculates the handling data for a podracer after an upgrade
+// a1 = Handling data to be modified
+// a2 = Upgrade category
+// a3 = Upgrade level
+// a4 = Upgrade health?! [0.0, 1.0]
+void __cdecl sub_4493F0(PodracerHandlingData* a1, int32_t a2, int32_t a3, float a4) {
+
+  switch (a2) {
+
+  case 0:
+    if (a3 == 1) {
+      a1->AntiSkid = clamp(a4 * 0.05f + a1->AntiSkid, 0.01f, 1.0f);
+    }
+    if (a3 == 2) {
+      a1->AntiSkid = clamp(a4 * 0.10f + a1->AntiSkid, 0.01f, 1.0f);
+    }
+    if (a3 == 3) {
+      a1->AntiSkid = clamp(a4 * 0.15f + a1->AntiSkid, 0.01f, 1.0f);
+    }
+    if (a3 == 4) {
+      a1->AntiSkid = clamp(a4 * 0.20f + a1->AntiSkid, 0.01f, 1.0f);
+    }
+    if (a3 == 5) {
+      a1->AntiSkid = clamp(a4 * 0.25f + a1->AntiSkid, 0.01f, 1.0f);
+    }
+    break;
+
+  case 1:
+    if (a3 == 1) {
+      a1->TurnResponse = clamp(a4 * 116.0f + a1->TurnResponse, 50.0f, 1000.0f);
+    }
+    if (a3 == 2) {
+      a1->TurnResponse = clamp(a4 * 232.0f + a1->TurnResponse, 50.0f, 1000.0f);
+    }
+    if (a3 == 3) {
+      a1->TurnResponse = clamp(a4 * 348.0f + a1->TurnResponse, 50.0f, 1000.0f);
+    }
+    if (a3 == 4) {
+      a1->TurnResponse = clamp(a4 * 464.0f + a1->TurnResponse, 50.0f, 1000.0f);
+    }
+    if (a3 == 5) {
+      a1->TurnResponse = clamp(a4 * 578.0f + a1->TurnResponse, 50.0f, 1000.0f);
+    }
+    break;
+
+  case 2:
+    if (a3 == 1) {
+      a1->Acceleration = clamp(((1.0f - a4) * 0.14f - -0.86f) * a1->Acceleration, 0.1f, 5.0f);
+    }
+    if (a3 == 2) {
+      a1->Acceleration = clamp(((1.0f - a4) * 0.28f - -0.72f) * a1->Acceleration, 0.1f, 5.0f);
+    }
+    if (a3 == 3) {
+      a1->Acceleration = clamp(((1.0f - a4) * 0.42f - -0.58f) * a1->Acceleration, 0.1f, 5.0f);
+    }
+    if (a3 == 4) {
+      a1->Acceleration = clamp(((1.0f - a4) * 0.56f - -0.44f) * a1->Acceleration, 0.1f, 5.0f);
+    }
+    if (a3 == 5) {
+      a1->Acceleration = clamp(((1.0f - a4) * 0.70f - -0.30f) * a1->Acceleration, 0.1f, 5.0f);
+    }
+    break;
+
+  case 3:
+    if (a3 == 1) {
+      a1->MaxSpeed = clamp(a4 * 40.0f + a1->MaxSpeed, 450.0f, 650.0f);
+    }
+    if (a3 == 2) {
+      a1->MaxSpeed = clamp(a4 * 80.0f + a1->MaxSpeed, 450.0f, 650.0f);
+    }
+    if (a3 == 3) {
+      a1->MaxSpeed = clamp(a4 * 120.0f + a1->MaxSpeed, 450.0f, 650.0f);
+    }
+    if (a3 == 4) {
+      a1->MaxSpeed = clamp(a4 * 160.0f + a1->MaxSpeed, 450.0f, 650.0f);
+    }
+    if (a3 == 5) {
+      a1->MaxSpeed = clamp(a4 * 200.0f + a1->MaxSpeed, 450.0f, 650.0f);
+    }
+    break;
+
+  case 4:
+    if (a3 == 1) {
+      a1->AirbrakeInv = clamp(((1.0f - a4) * 0.08f - -0.92f) * a1->AirbrakeInv, 1.0f, 1000.0f);
+    }
+    if (a3 == 2) {
+      a1->AirbrakeInv = clamp(((1.0f - a4) * 0.17f - -0.83f) * a1->AirbrakeInv, 1.0f, 1000.0f);
+    }
+    if (a3 == 3) {
+      a1->AirbrakeInv = clamp(((1.0f - a4) * 0.26f - -0.74f) * a1->AirbrakeInv, 1.0f, 1000.0f);
+    }
+    if (a3 == 4) {
+      a1->AirbrakeInv = clamp(((1.0f - a4) * 0.35f - -0.65f) * a1->AirbrakeInv, 1.0f, 1000.0f);
+    }
+    if (a3 == 5) {
+      a1->AirbrakeInv = clamp(((1.0f - a4) * 0.44f - -0.56f) * a1->AirbrakeInv, 1.0f, 1000.0f);
+    }
+    break;
+
+  case 5:
+    if (a3 == 1) {
+      a1->CoolRate = clamp(a4 * 1.6f + a1->CoolRate, 1.0f, 20.0f);
+    }
+    if (a3 == 2) {
+      a1->CoolRate = clamp(a4 * 3.2f + a1->CoolRate, 1.0f, 20.0f);
+    }
+    if (a3 == 3) {
+      a1->CoolRate = clamp(a4 * 4.8f + a1->CoolRate, 1.0f, 20.0f);
+    }
+    if (a3 == 4) {
+      a1->CoolRate = clamp(a4 * 6.4f + a1->CoolRate, 1.0f, 20.0f);
+    }
+    if (a3 == 5) {
+      a1->CoolRate = clamp(a4 * 8.0f + a1->CoolRate, 1.0f, 20.0f);
+    }
+    break;
+
+  case 6:
+    if (a3 == 1) {
+      a1->RepairRate = clamp(a4 * 0.10f + a1->RepairRate, 0.0f, 1.0f);
+    }
+    if (a3 == 2) {
+      a1->RepairRate = clamp(a4 * 0.20f + a1->RepairRate, 0.0f, 1.0f);
+    }
+    if (a3 == 3) {
+      a1->RepairRate = clamp(a4 * 0.30f + a1->RepairRate, 0.0f, 1.0f);
+    }
+    if (a3 == 4) {
+      a1->RepairRate = clamp(a4 * 0.40f + a1->RepairRate, 0.0f, 1.0f);
+    }
+    if (a3 == 5) {
+      a1->RepairRate = clamp(a4 * 0.45f + a1->RepairRate, 0.0f, 1.0f);
+    }
+    break;
+
+  default:
+    break;
+  }
+  return;
+}
+