3d: WindowsAPI: windows-make: Calculation eror?

Lines Lifted from Anchor, is'nt it?

If t=0, something happened. 

vCurveCalculation.cpp  Mon Dec 30 19:04:22 2019

  1 :#include 
  2 :#include 
  3 :#include  // ADD: 20191230
  4 :
  5 :#include "array_counter.h"	// ADD: 20191230
  6 :#include "sender.h"			// ADD: 20191230
  7 :#include "Print.h"			// ADD: 20191230
  8 :
  9 :#include "vPoint.h"
 10 :#include "vLine.h"
 11 :#include "vCalculation.h"
 12 :#include "vCurveCalculation.h"
 13 :
 14 :vPoint* vCurveCalculation::BattleField (vPoint* p1, vPoint* p2, vPoint* p3, vPoint* p4, float t) {
 15 :	vCalculation* calc = nullptr;
 16 :
 17 :	printf("vCurveCalculation::BattleField: |%p|%p|%p|%p|", p1, p2, p3, p4 );
 18 :	// calculation, revisement
 19 :	float tt = t*t;
 20 :	float c=2.0f;
 21 :
 22 :	// Linear
 23 :	vPoint* p5 = calc->scalize( p1, (1.0f - t) );	// anchor p1
 24 :	vPoint* p6 = calc->scalize ( p4, t ); 			// anchor p4
 25 :
 26 :	vPoint* point = calc->add ( p5, p6 );
 27 :
 28 :	//consider, p2 and p3 which are controls points.
 29 :	// Curve
 30 :	// if t=0:
 31 :	// curve_point=p1:
 32 :	// p2=0:
 33 :	// p3=0:
 34 :	// if t=1:
 35 :	// curve_point=p4:
 36 :	// p2=0:
 37 :	// p3=0:
 38 :	float graph = -0.5*( t - 0.5 )*( t - 0.5 ) + 1.0;
 39 :	vPoint* p7 = calc->scalize ( p2,  graph );
 40 :	vPoint* p8 = calc->scalize ( p3,  graph );
 41 :	vPoint* curve_point_001 = calc->add ( p7, p8 );
 42 :	vPoint* curve_point = calc->scalize( curve_point_001, 0.5f);
 43 :
 44 :	// Linear + Curve: Blend
 45 :	// Debug
 46 :	//vPoint* blend_001 = calc->add( curve_point, point );
 47 :	vPoint* blend_001 = calc->add( curve_point, point );
 48 :	vPoint* blend = calc->scalize( blend_001, 0.5f);
 49 :
 50 :	level_error_msg = 2;
 51 :	// Calculated points printed.
 52 :	log_msg_003("p5=");
 53 :	p5->print();
 54 :	log_msg_003("p7=");
 55 :	p7->print();
 56 :
 57 :	log_msg_003("curve_point=");
 58 :	curve_point->print();
 59 :	log_msg_003("blend=");
 60 :	blend->print();
 61 :	log_msg_003("blend_001=");
 62 :	blend_001->print();
 63 :	log_msg_003("point=");
 64 :	point->print();
 65 :	level_error_msg = 3;
 66 :
 67 :	printf("vCurveCalculation::BattleField: |%p|\r\n", blend );
 68 ://	exit(-1);
 69 :	return blend;
 70 :
 71 ://	return curve_point;
 72 :}
 73 :
 74 :// p1: Anchor
 75 :// p2: setting controls
 76 ://
 77 :// p3: Anchor(next)
 78 :// p4: setting controls
 79 ://
 80 ://      vCurveCalculation
 81 ://                         Position 
 82 :/* vPoint* vCurveCalculation::Position (vPoint* p1, vPoint* p2, vPoint p3, vPoint* p4, float t) {
 83 :	vCalculation* calc = nullptr;
 84 :
 85 :	// calculation, revisement
 86 :	float tt = t*t;
 87 :
 88 :	vPoint* p5 = calc->multiple ( p1, 1 - tt );
 89 :	vPoint* p6 = calc->multiple ( p3, tt );
 90 :
 91 :	vPoint point calc->add ( p5, p6 );
 92 :
 93 :	//consider, p2 and p3 which is controls point.
 94 :
 95 :	return point;
 96 :}*/
 97 :