Outsource draw force function about gothicfreeaim

[szapp]

Fix #43 #47 #42 outsource accuracy and draw force

[szapp]

/* Retrieve draw force scaled between 0 and 100 (percent). Modify this function to alter the draw force calculation */
func int freeAimGetDrawForce() {
    // Scale draw time between 0 and 100
    var int drawForce; drawForce = MEM_Timer.totalTime - bowDrawOnset; // Check for how long the bow was drawn
    if (drawForce > FREEAIM_DRAWTIME_MAX) { drawForce = 100; } // Fully drawn
    else if (drawForce < FREEAIM_DRAWTIME_MIN) { drawForce = 0; } // No negative numbers
    else { // Calculate the percentage [0, 100]
        var int numerator; numerator = mkf(100 * (drawForce - FREEAIM_DRAWTIME_MIN));
        var int denominator; denominator = mkf(FREEAIM_DRAWTIME_MAX - FREEAIM_DRAWTIME_MIN);
        drawForce = roundf(divf(numerator, denominator));
    };
    // Possibly incorporate more factors like e.g. a quick-draw talent, weapon-specific stats, ...
    // If adding more factors, keep in mind that the final drawForce must be in [0, 100]. This line could ensure that:
    // if (drawForce > 100) { drawForce = 100; } else if (drawForce < 0) { drawForce = 0; };
    return drawForce;
};

/* ... */

var int drawForce; drawForce = mulf(fracf(freeAimGetDrawForce(), 100), mkf(FREEAIM_TRAJECTORY_ARC_MAX));
FF_ApplyOnceExtData(dropProjectile, roundf(drawForce), 1, rBody);
bowDrawOnset = MEM_Timer.totalTime; // Reset draw timer

[szapp]

The time of gravity activation should be outsourced into its own function, that can be easily modified and adjusted to talent and weapon.