GSDP:GAM100/CProcessing/CP Vector Normalize()

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CP_Vector_Normalize()

Description

Returns a copy of the normalized input CP_Vector. A normalized vector is one where the magnitude (length) is 1. Meaning CP_Vector_Length() will always return 1 on a normalized vector.

Parameters

CP_Vector_Normalize(CP_Vector a)

  • a - (CP_Vector) - Vector to normalize

Example

CP_Vector position;
CP_Vector position2;
CP_Vector speed;
CP_Vector norm;

void init()
{
  position = CP_Vector_Set(CP_System_GetWindowWidth() / 2, CP_System_GetWindowHeight() / 4);
  position2 = CP_Vector_Set(CP_System_GetWindowWidth() / 2, 3 * CP_System_GetWindowHeight() / 4);
  speed = CP_Vector_Set(CP_Random_RangeFloat(5.0f, 10.0f), 0.0f);
  norm = CP_Vector_Normalize(speed);

  CP_Settings_EllipseMode(CP_POSITION_CENTER);
  CP_Font_Set(CP_Font_GetDefault());
}

void update()
{
  CP_Settings_Background(CP_Color_Create(255, 255, 255, 255));

  // Check if direction should be inverted
  if (position.x > CP_System_GetWindowWidth())
  {
    speed = CP_Vector_Negate(speed);
    norm = CP_Vector_Normalize(speed);
    position.x = CP_System_GetWindowWidth();
  }
  else if (position.x < 0)
  {
    speed = CP_Vector_Negate(speed);
    norm = CP_Vector_Normalize(speed);
    position.x = 0;
  }

  // Update position
  position = CP_Vector_Add(position, speed);
  position2 = CP_Vector_Add(position2, norm);

  // Draw the circles
  CP_Settings_Fill(color(255, 0, 0, 255));
  CP_Graphics_DrawCircle(position.x, position.y, 40);
  CP_Settings_Fill(color(0, 0, 255, 255));
  CP_Graphics_DrawCircle(position2.x, position2.y, 40);

  // Draw the speed and normzlied speed
  char speed_text[128] = {0};
  sprintf_s(speed_text, 128, "Speed: [%.2f,%.2f] Normalized: [%.2f,%.2f]", speed.x, speed.y, norm.x, norm.y);
  CP_Settings_Fill(color(0, 0, 0, 255));
  CP_Font_DrawText(speed_text, CP_System_GetWindowWidth() / 2 - 160, CP_System_GetWindowHeight() / 2);
}

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