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add default equations and KeyBoard controls
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@windr00
windr00 committed Feb 11, 2020
1 parent 1d03299 commit c5860ee
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Showing 4 changed files with 168 additions and 39 deletions.
165 changes: 129 additions & 36 deletions ChaosEquation.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -42,31 +42,38 @@ public float y
}

}
private Device device;
private Device device;


private const int iterations = 600;
private const int steps = 400;
private const double deltaPerStep = 1e-5;
private const double deltaMinimum = 1e-7;
private VertexBuffer gpuVertices;
private Vertex[] vertexArray;
private VertexDeclaration vertexDecl;
private float plotScale = 0.25f;
private float plotX = 0.0f;
private float plotY = 0.0f;
private double t = double.MaxValue;
private int width;
private int height;

private VertexBuffer gpuRectangle;
private VertexDeclaration rectangleDecl;
private VertexBuffer gpuVertices;
private Vertex[] vertexArray;
private VertexDeclaration vertexDecl;
private float plotScale = 0.5f;
private float plotX = 0.0f;
private float plotY = 0.0f;
private double t = double.MaxValue;
private int width;
private int height;

private VertexBuffer gpuRectangle;
private VertexDeclaration rectangleDecl;
Random rand_int;
private const double tStart = -3.0;
private const double tEnd = 3.0;
private string equationCode = "";
public void Initialize()
private string equationCode = "";
private bool next = false;
private bool reset = false;
private bool pause = false;
private bool center = false;
private bool loop = false;
public void Initialize()
{
var unix = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
rand_int = new Random(unix);
var parameter = new PresentParameters(form.ClientSize.Width, form.ClientSize.Height);
parameter.MultiSampleType = MultisampleType.EightSamples;
parameter.PresentationInterval = PresentInterval.One;
Expand All @@ -79,8 +86,8 @@ public void Initialize()
gpuVertices.Lock(0, 0, LockFlags.None).WriteRange(vertexArray);
gpuVertices.Unlock();
gpuRectangle = new VertexBuffer(device, 6 * 12, Usage.WriteOnly, VertexFormat.None, Pool.Managed);
device.SetRenderState(RenderState.PointSize, 2.0f);

device.SetRenderState(RenderState.PointSize, 1.0f);
device.SetRenderState(RenderState.MultisampleAntialias, true);
device.SetRenderState(RenderState.AlphaBlendEnable, true);

Expand All @@ -99,10 +106,9 @@ public void Initialize()
vertexDecl = new VertexDeclaration(device, vertexElems);
}

void RandParams(ref double[] parameters)
void RandParams(ref double[] parameters)
{
var unix = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
var rand_int = new Random(unix);

for (int i = 0; i < parameters.Length; i++)
{
int r = rand_int.Next(0, 3);
Expand All @@ -121,7 +127,7 @@ void RandParams(ref double[] parameters)
}
}

string ParamsToString(ref double[] parameters)
string ParamsToString(ref double[] parameters)
{
char[] base27 = "_ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
int a = 0;
Expand All @@ -141,7 +147,7 @@ string ParamsToString(ref double[] parameters)
return result;
}

void SIGN_OR_SKIP(int i, string x, ref StringBuilder ss, ref bool isFirst, double[] parameters)
void SIGN_OR_SKIP(int i, string x, ref StringBuilder ss, ref bool isFirst, double[] parameters)
{
if (parameters[i] != 0.0)
{
Expand All @@ -168,7 +174,30 @@ void SIGN_OR_SKIP(int i, string x, ref StringBuilder ss, ref bool isFirst, doubl
}
}

string MakeEquationString(double[] parameters)

static void StringToParams(string str, ref double[] parameters)
{
for (int i = 0; i < parameters.Length / 3; ++i)
{
int a = 0;
char c = (i < str.Length ? str[i] : '_');
if (c >= 'A' && c <= 'Z')
{
a = (int)(c - 'A') + 1;
}
else if (c >= 'a' && c <= 'z')
{
a = (int)(c - 'a') + 1;
}
parameters[i * 3 + 2] = (double)(a % 3) - 1.0;
a /= 3;
parameters[i * 3 + 1] = (double)(a % 3) - 1.0;
a /= 3;
parameters[i * 3 + 0] = (double)(a % 3) - 1.0;
}
}

string MakeEquationString(double[] parameters)
{
StringBuilder ss = new StringBuilder();
bool isFirst = true;
Expand All @@ -185,7 +214,37 @@ string MakeEquationString(double[] parameters)
return ss.ToString();
}

void GenerateNew(out double t, ref double[] parameters)
const float FLT_MAX = float.MaxValue;
void CenterPlot(ref List<Vector2> history)
{
float min_x = FLT_MAX;
float max_x = -FLT_MAX;
float min_y = FLT_MAX;
float max_y = -FLT_MAX;
for (int i = 0; i < history.Count; ++i)
{
var point = history[i];
if (float.IsNaN(point.X) && float.IsNaN(point.Y))
{
continue;
}
min_x = Math.Min(min_x, point.X);
max_x = Math.Max(max_x, point.X);
min_y = Math.Min(min_y, point.Y);
max_y = Math.Max(max_y, point.Y);
}
max_x = Math.Min(max_x, 4.0f);
max_y = Math.Min(max_y, 4.0f);
min_x = Math.Max(min_x, -4.0f);
min_y = Math.Max(min_y, -4.0f);
plotX = (max_x + min_x) * 0.5f;
plotY = (max_y + min_y) * 0.5f;
plotScale = 1.0f / Math.Max(Math.Max(max_x - min_x, max_y - min_y) * 0.6f, 0.1f);
}

private static readonly string[] Equations = { "CODEPA", "VKDI_J", "DPPREG", "RMCQDI", "LDNMGQ", "JJPVDN", "HELPME", "I_CNJJ", "VJQZJG", "MMJKMA"};

void GenerateNew(out double t, ref double[] parameters)
{
var unix = (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
var rand_int = new Random(unix);
Expand All @@ -209,14 +268,14 @@ void GenerateNew(out double t, ref double[] parameters)
Console.WriteLine(equationString);
}

void ResetPlot()
void ResetPlot()
{
plotScale = 0.25f;
plotScale = 0.5f;
plotX = 0.0f;
plotY = 0.0f;
}

private Color GetRandColor(int i)
private Color GetRandColor(int i)
{
i += 1;
int r = Math.Min(255, 50 + (i * 11909) % 256);
Expand All @@ -225,15 +284,15 @@ private Color GetRandColor(int i)
return new Color(r, g, b, 16);
}

private Vector2 ToScreen(double x, double y)
private Vector2 ToScreen(double x, double y)
{
float s = plotScale * (float)(height / 2);
float nx = (float)width * 0.5f + ((float)x - plotX) * s;
float ny = (float)height * 0.5f + ((float)y - plotY) * s;
return new Vector2(nx, ny);
}

public void Render()
public void Render()
{
double[] parameters = new double[18];
for (int i = 0; i < vertexArray.Length; i++)
Expand All @@ -246,17 +305,49 @@ public void Render()
{
history.Add(new Vector2());
}
var looper = 0;
RenderLoop.Run(form, () =>
{
if (t > tEnd)
if (pause)
{
ResetPlot();
RandParams(ref parameters);
GenerateNew(out t, ref parameters);
return;
}
if (t > tEnd || next)
{
if (loop && !next)
{
t = tStart;
}
else
{
next = false;
ResetPlot();
if (looper < Equations.Length)
{
StringToParams(Equations[looper], ref parameters);
looper++;
}
else
{
RandParams(ref parameters);
}
GenerateNew(out t, ref parameters);
}
} else if (reset)
{
reset = false;
t = tStart;
}
else if (center)
{
center = false;
device.Clear(ClearFlags.Target, Color.Black, 0.0f, 0);
CenterPlot(ref history);
}

//TODO : fade colors;
device.BeginScene();
device.SetRenderState(RenderState.AlphaBlendEnable, true);
device.SetRenderState(RenderState.SourceBlendAlpha, Blend.One);//D3DBLEND_ONE
device.SetRenderState(RenderState.DestinationBlendAlpha, Blend.One);//D3DBLEND_ONE
device.SetRenderState(RenderState.BlendOperationAlpha, BlendOperation.ReverseSubtract);
Expand Down Expand Up @@ -292,7 +383,7 @@ public void Render()
float dx = history[iter].X - (float)x;
float dy = history[iter].Y - (float)y;
double dist = (double)(500.0f * Math.Sqrt(dx * dx + dy * dy));

if (!double.IsNaN(dist))
{
rollingDelta = Math.Min(rollingDelta, Math.Max(delta / (dist + 1e-5), deltaMinimum));
Expand All @@ -312,11 +403,13 @@ public void Render()
}
}


gpuVertices.Lock(0, 0, LockFlags.None).WriteRange(vertexArray);
gpuVertices.Unlock();
device.SetRenderState(RenderState.SourceBlendAlpha, Blend.One);//D3DBLEND_ONE
device.SetRenderState(RenderState.DestinationBlendAlpha, Blend.Zero);//D3DBLEND_ONE
device.SetRenderState(RenderState.BlendOperationAlpha, BlendOperation.Maximum);
device.SetRenderState(RenderState.SourceBlend, Blend.One);//D3DBLEND_ONE
device.SetRenderState(RenderState.DestinationBlend, Blend.One);//D3DBLEND_ONE
device.SetRenderState(RenderState.DestinationBlend, Blend.Zero);//D3DBLEND_ONE
device.SetRenderState(RenderState.BlendOperation, BlendOperation.Maximum);

device.SetStreamSource(0, gpuVertices, 0, 12);
Expand Down
1 change: 0 additions & 1 deletion ChaosScreen.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@
<FileAlignment>512</FileAlignment>
<Deterministic>true</Deterministic>
<TargetFrameworkProfile />

</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<PlatformTarget>AnyCPU</PlatformTarget>
Expand Down
10 changes: 9 additions & 1 deletion Program.cs
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Original file line number Diff line number Diff line change
@@ -1,10 +1,14 @@
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace ChaosScreen
{
static class Program
{

[DllImport("user32.dll", SetLastError = false)]
static extern IntPtr GetDesktopWindow();
static void ShowScreenSaver()
{
var allScreens = Screen.AllScreens;
Expand Down Expand Up @@ -78,7 +82,11 @@ static void Main(String[] args)
}
else // No arguments - treat like /c
{
Application.Run(new About());
//var screen = new ScreenSaverForm(GetDesktopWindow());
//screen.Initialize();
//screen.Render();
//Application.Run(new About());
ShowScreenSaver();
}

}
Expand Down
31 changes: 30 additions & 1 deletion ScreenSaverForm.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,12 +2,16 @@
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace ChaosScreen
{
public partial class ScreenSaverForm
{


[DllImport("user32.dll", SetLastError = false)]
static extern IntPtr GetDesktopWindow();

public RenderForm form;

private void createForm(System.Drawing.Rectangle bounds)
Expand Down Expand Up @@ -67,6 +71,8 @@ public ScreenSaverForm(IntPtr PreviewWndHandle)
form.Location = new System.Drawing.Point(0, 0);

this.previewMode = true;
this.form.TopMost = false;
Cursor.Show();
}

private void ScreenSaverForm_MouseMove(object sender, MouseEventArgs e)
Expand Down Expand Up @@ -96,7 +102,30 @@ private void ScreenSaverForm_Click(object sender, EventArgs e)

private void ScreenSaverForm_KeyPress(object sender, KeyPressEventArgs e)
{

if (previewMode)
{
return;
}
if (e.KeyChar == 'n')
{
this.next = true;
}
if (e.KeyChar == 'r')
{
this.reset = true;
}
if (e.KeyChar == ' ')
{
this.pause = !this.pause;
}
if (e.KeyChar == 'c')
{
this.center = true;
}
if (e.KeyChar == 'l')
{
this.loop = !this.loop;
}
}

private void ScreenSaverForm_KeyDown(object sender, KeyEventArgs e)
Expand Down

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