GSDP:GAM100/CProcessing/CP Vector Add()
From Inside
< GSDP:GAM100 | CProcessing
CP_Vector_Add()
Description
Returns the sum of two CP_Vectors as a new CP_Vector.
Parameters
CP_Vector_Add(CP_Vector a, CP_Vector b)
- a - (CP_Vector) the vector to add with b
- b - (CP_Vector) the vector to add with a
Example
CP_Vector position;
CP_Vector speed;
void init()
{
// Set position to the center of the screen
position = CP_Vector_Set(CP_System_GetWindowHeight()/ 2, CP_System_GetWindowWidth() / 2);
// Set speed to 50 in the x-direction
speed = CP_Vector_Set(50.0f, 0.0f);
// Set Ellipse mode so that the center is drawn at the specified location
CP_Settings_EllipseMode(CP_POSITION_CENTER);
// Set fill color for shapes to red
CP_Settings_Fill(CP_Color_Create(255, 0, 0, 255));
}
CP_BOOL forward = true;
void update()
{
CP_Settings_Background(CP_Color_Create(255, 255, 255, 255));
// Check if direction should be inverted
if (position.x > CP_System_GetWindowWidth())
{
forward = false;
position.x = CP_System_GetWindowWidth();
}
else if (position.x < 0)
{
forward = true;
position.x = 0;
}
// Update position
if (forward)
position = CP_Vector_Add(position, CP_Vector_Scale(speed, CP_System_GetDt()));
else if(!forward)
position = CP_Vector_Subtract(position, CP_Vector_Scale(speed, CP_System_GetDt()));
// Draw the circle
CP_Graphics_DrawCircle(position.x, position.y, 40);
}
