aboutsummaryrefslogtreecommitdiff
path: root/vendor/github.com/llgcode/ps/operators_math.go
blob: 4340f15a560bb10bc3120eb491a6aad4c9633edb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
// Copyright 2010 The postscript-go Authors. All rights reserved.
// created: 13/12/2010 by Laurent Le Goff

//Arithmetic and Math Operators
package ps

import (
	"math"
	"math/rand"
)

// begin Primitive Operator implementation

//num1  num2 add sum -> Return num1 plus num2
func add(interpreter *Interpreter) {
	num2 := interpreter.PopFloat()
	num1 := interpreter.PopFloat()
	interpreter.Push(num1 + num2)
}

//num1  num2 div quotient -> Return num1 divided by num2
func div(interpreter *Interpreter) {
	num2 := interpreter.PopFloat()
	num1 := interpreter.PopFloat()
	interpreter.Push(num1 / num2)
}

//int1  int2 idiv quotient -> Return int1 divided by int2
func idiv(interpreter *Interpreter) {
	int2 := interpreter.PopInt()
	int1 := interpreter.PopInt()
	interpreter.Push(float64(int1 / int2))
}

//int   int mod remainder -> Return remainder after dividing int  by int
func mod(interpreter *Interpreter) {
	int2 := interpreter.PopInt()
	int1 := interpreter.PopInt()
	interpreter.Push(float64(int1 % int2))
}

//num1  num2 mul product -> Return num1 times num2
func mul(interpreter *Interpreter) {
	num2 := interpreter.PopFloat()
	num1 := interpreter.PopFloat()
	interpreter.Push(num1 * num2)
}

//num1  num2 sub difference -> Return num1 minus num2
func sub(interpreter *Interpreter) {
	num2 := interpreter.PopFloat()
	num1 := interpreter.PopFloat()
	interpreter.Push(num1 - num2)
}

//num1 abs num2 -> Return absolute value of num1
func abs(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(math.Abs(f))
}

//num1 neg num2 -> Return negative of num1
func neg(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(-f)
}

//num1 ceiling num2 -> Return ceiling of num1
func ceiling(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(float64(int(f + 1)))
}

//num1 floor num2 -> Return floor of num1
func floor(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(math.Floor(f))
}

//num1 round num2 -> Round num1 to nearest integer
func round(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(float64(int(f + 0.5)))
}

//num1 truncate num2 -> Remove fractional part of num1
func truncate(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(float64(int(f)))
}

//num sqrt real -> Return square root of num
func sqrt(interpreter *Interpreter) {
	f := interpreter.PopFloat()
	interpreter.Push(float64(math.Sqrt(f)))
}

//num  den atan angle -> Return arctangent of num/den in degrees
func atan(interpreter *Interpreter) {
	den := interpreter.PopFloat()
	num := interpreter.PopFloat()
	interpreter.Push(math.Atan2(num, den) * (180.0 / math.Pi))
}

//angle cos real -> Return cosine of angle degrees
func cos(interpreter *Interpreter) {
	a := interpreter.PopFloat() * math.Pi / 180
	interpreter.Push(math.Cos(a))
}

//angle sin real -> Return sine of angle degrees
func sin(interpreter *Interpreter) {
	a := interpreter.PopFloat() * math.Pi / 180
	interpreter.Push(math.Sin(a))
}

//base  exponent exp real -> Raise base to exponent power
func exp(interpreter *Interpreter) {
	exponent := interpreter.PopFloat()
	base := interpreter.PopFloat()
	interpreter.Push(math.Pow(base, exponent))
}

//num ln real -> Return natural logarithm (base e)
func ln(interpreter *Interpreter) {
	num := interpreter.PopFloat()
	interpreter.Push(math.Log(num))
}

//num log real -> Return common logarithm (base 10)
func log10(interpreter *Interpreter) {
	num := interpreter.PopFloat()
	interpreter.Push(math.Log10(num))
}

//– rand int Generate pseudo-random integer
func randInt(interpreter *Interpreter) {
	interpreter.Push(float64(rand.Int()))
}

var randGenerator *rand.Rand

//int srand – -> Set random number seed
func srand(interpreter *Interpreter) {
	randGenerator = rand.New(rand.NewSource(int64(interpreter.PopInt())))
}

//– rrand int -> Return random number seed
func rrand(interpreter *Interpreter) {
	interpreter.Push(float64(randGenerator.Int()))
}

func initMathOperators(interpreter *Interpreter) {
	interpreter.SystemDefine("add", NewOperator(add))
	interpreter.SystemDefine("div", NewOperator(div))
	interpreter.SystemDefine("idiv", NewOperator(idiv))
	interpreter.SystemDefine("mod", NewOperator(mod))
	interpreter.SystemDefine("mul", NewOperator(mul))
	interpreter.SystemDefine("sub", NewOperator(sub))
	interpreter.SystemDefine("abs", NewOperator(abs))
	interpreter.SystemDefine("neg", NewOperator(neg))
	interpreter.SystemDefine("ceiling", NewOperator(ceiling))
	interpreter.SystemDefine("floor", NewOperator(floor))
	interpreter.SystemDefine("round", NewOperator(round))
	interpreter.SystemDefine("truncate", NewOperator(truncate))
	interpreter.SystemDefine("sqrt", NewOperator(sqrt))
	interpreter.SystemDefine("atan", NewOperator(atan))
	interpreter.SystemDefine("cos", NewOperator(cos))
	interpreter.SystemDefine("sin", NewOperator(sin))
	interpreter.SystemDefine("exp", NewOperator(exp))
	interpreter.SystemDefine("ln", NewOperator(ln))
	interpreter.SystemDefine("log", NewOperator(log10))
	interpreter.SystemDefine("rand", NewOperator(randInt))
	interpreter.SystemDefine("srand", NewOperator(srand))
	interpreter.SystemDefine("rrand", NewOperator(rrand))

}