Построение графика графика квадратичной функции - C#
Формулировка задачи:
Как построить график квадратичной функции?
Построил только простую параболу, как ее сдвигать?
int ixPrev = -1, iyPrev = (int)halfH; for (int ix = 0; ix < W; ix++) { float px = (ix - halfW) / halfW; px *= (float)Math.PI; float py = (float)Math.Pow(px, 2); int iy = (int)(halfH - py * halfH); g.DrawLine(Pens.Red, ixPrev, iyPrev, ix, iy); ixPrev = ix; iyPrev = iy; }
Решение задачи: «Построение графика графика квадратичной функции»
textual
Листинг программы
namespace draw { partial class Form1 { /// <summary> /// Требуется переменная конструктора. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Освободить все используемые ресурсы. /// </summary> /// <param name="disposing">истинно, если управляемый ресурс должен быть удален; иначе ложно.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Код, автоматически созданный конструктором форм Windows /// <summary> /// Обязательный метод для поддержки конструктора - не изменяйте /// содержимое данного метода при помощи редактора кода. /// </summary> private void InitializeComponent() { this.pictureBox1 = new System.Windows.Forms.PictureBox(); this.num_B = new System.Windows.Forms.NumericUpDown(); this.num_C = new System.Windows.Forms.NumericUpDown(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.label3 = new System.Windows.Forms.Label(); this.button1 = new System.Windows.Forms.Button(); this.txt_A = new System.Windows.Forms.TextBox(); ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.num_B)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.num_C)).BeginInit(); this.SuspendLayout(); // // pictureBox1 // this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Top; this.pictureBox1.Location = new System.Drawing.Point(0, 0); this.pictureBox1.Name = "pictureBox1"; this.pictureBox1.Size = new System.Drawing.Size(392, 392); this.pictureBox1.TabIndex = 0; this.pictureBox1.TabStop = false; // // num_B // this.num_B.Location = new System.Drawing.Point(156, 398); this.num_B.Name = "num_B"; this.num_B.Size = new System.Drawing.Size(52, 20); this.num_B.TabIndex = 2; this.num_B.Value = new decimal(new int[] { 1, 0, 0, 0}); this.num_B.ValueChanged += new System.EventHandler(this.txt_A_VisibleChanged); // // num_C // this.num_C.Location = new System.Drawing.Point(292, 398); this.num_C.Name = "num_C"; this.num_C.Size = new System.Drawing.Size(52, 20); this.num_C.TabIndex = 3; this.num_C.Value = new decimal(new int[] { 1, 0, 0, 0}); this.num_C.ValueChanged += new System.EventHandler(this.txt_A_VisibleChanged); // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(12, 400); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(17, 13); this.label1.TabIndex = 4; this.label1.Text = "A:"; // // label2 // this.label2.AutoSize = true; this.label2.Location = new System.Drawing.Point(133, 400); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(17, 13); this.label2.TabIndex = 5; this.label2.Text = "B:"; // // label3 // this.label3.AutoSize = true; this.label3.Location = new System.Drawing.Point(269, 400); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(17, 13); this.label3.TabIndex = 6; this.label3.Text = "C:"; // // button1 // this.button1.Location = new System.Drawing.Point(348, 396); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(43, 24); this.button1.TabIndex = 7; this.button1.Text = "Draw"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // txt_A // this.txt_A.Location = new System.Drawing.Point(35, 399); this.txt_A.Name = "txt_A"; this.txt_A.Size = new System.Drawing.Size(61, 20); this.txt_A.TabIndex = 8; this.txt_A.Text = "0,5"; this.txt_A.VisibleChanged += new System.EventHandler(this.txt_A_VisibleChanged); this.txt_A.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txt_A_KeyDown); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(392, 426); this.Controls.Add(this.txt_A); this.Controls.Add(this.button1); this.Controls.Add(this.label3); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Controls.Add(this.num_C); this.Controls.Add(this.num_B); this.Controls.Add(this.pictureBox1); this.MaximumSize = new System.Drawing.Size(400, 460); this.MinimumSize = new System.Drawing.Size(400, 460); this.Name = "Form1"; this.Text = "Form1"; ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.num_B)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.num_C)).EndInit(); this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.PictureBox pictureBox1; private System.Windows.Forms.NumericUpDown num_B; private System.Windows.Forms.NumericUpDown num_C; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.Label label3; private System.Windows.Forms.Button button1; private System.Windows.Forms.TextBox txt_A; } }
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