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Doubled the size of particles and made them slightly faster.

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the_fiddler 2009-11-04 10:47:20 +00:00
parent 11b68be5d0
commit f0fb55b864
1 changed files with 10 additions and 12 deletions
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22
Source/Examples/OpenGL/1.5/DynamicVBO.cs
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@ -19,7 +19,7 @@ namespace Examples.Tutorial
} }
#region Particles #region Particles
const int MaxParticleCount = 1000; static int MaxParticleCount = 2000;
int VisibleParticleCount; int VisibleParticleCount;
VertexC4ubV3f[] VBO = new VertexC4ubV3f[MaxParticleCount]; VertexC4ubV3f[] VBO = new VertexC4ubV3f[MaxParticleCount];
ParticleAttribut[] ParticleAttributes = new ParticleAttribut[MaxParticleCount]; ParticleAttribut[] ParticleAttributes = new ParticleAttribut[MaxParticleCount];
@ -79,11 +79,11 @@ namespace Examples.Tutorial
VBO[i].A = (byte) rnd.Next( 0, 256 ); // isn't actually used VBO[i].A = (byte) rnd.Next( 0, 256 ); // isn't actually used
VBO[i].Position = Vector3.Zero; // all particles are born at the origin VBO[i].Position = Vector3.Zero; // all particles are born at the origin
// generate direction vector in the range [-0.1f...+0.1f] // generate direction vector in the range [-0.25f...+0.25f]
// that's slow enough so you can see particles 'disappear' when they are respawned // that's slow enough so you can see particles 'disappear' when they are respawned
temp.X = (float) ( ( rnd.NextDouble( ) - 0.5 ) * 0.2 ); temp.X = (float) ( ( rnd.NextDouble( ) - 0.5 ) * 0.5f );
temp.Y = (float) ( ( rnd.NextDouble( ) - 0.5 ) * 0.2 ); temp.Y = (float) ( ( rnd.NextDouble( ) - 0.5 ) * 0.5f );
temp.Z = (float) ( ( rnd.NextDouble( ) - 0.5 ) * 0.2 ); temp.Z = (float) ( ( rnd.NextDouble( ) - 0.5 ) * 0.5f );
ParticleAttributes[i].Direction = temp; // copy ParticleAttributes[i].Direction = temp; // copy
ParticleAttributes[i].Age = 0; ParticleAttributes[i].Age = 0;
} }
@ -108,7 +108,7 @@ namespace Examples.Tutorial
GL.Viewport(0, 0, Width, Height); GL.Viewport(0, 0, Width, Height);
GL.MatrixMode(MatrixMode.Projection); GL.MatrixMode(MatrixMode.Projection);
Matrix4 p = Matrix4.Perspective(45.0f, Width / (float)Height, 0.1f, 50.0f); Matrix4 p = Matrix4.CreatePerspectiveFieldOfView(MathHelper.PiOver4, Width / (float)Height, 0.1f, 50.0f);
GL.LoadMatrix(ref p); GL.LoadMatrix(ref p);
GL.MatrixMode(MatrixMode.Modelview); GL.MatrixMode(MatrixMode.Modelview);
@ -136,15 +136,15 @@ namespace Examples.Tutorial
for ( int i = MaxParticleCount - VisibleParticleCount ; i < MaxParticleCount ; i++ ) for ( int i = MaxParticleCount - VisibleParticleCount ; i < MaxParticleCount ; i++ )
{ {
if ( ParticleAttributes[i].Age >= MaxParticleCount ) if (ParticleAttributes[i].Age >= MaxParticleCount)
{ {
// reset particle // reset particle
ParticleAttributes[i].Age = 0; ParticleAttributes[i].Age = 0;
VBO[i].Position = Vector3.Zero; VBO[i].Position = Vector3.Zero;
} else } else
{ {
ParticleAttributes[i].Age++; ParticleAttributes[i].Age += (uint)Math.Max(ParticleAttributes[i].Direction.LengthFast * 10, 1);
Vector3.Mult( ref ParticleAttributes[i].Direction, (float) e.Time, out temp ); Vector3.Multiply( ref ParticleAttributes[i].Direction, (float) e.Time, out temp );
Vector3.Add( ref VBO[i].Position, ref temp, out VBO[i].Position ); Vector3.Add( ref VBO[i].Position, ref temp, out VBO[i].Position );
} }
} }
@ -188,9 +188,7 @@ namespace Examples.Tutorial
// RenderFrame events (as fast as the computer can handle). // RenderFrame events (as fast as the computer can handle).
using (T09_VBO_Dynamic example = new T09_VBO_Dynamic()) using (T09_VBO_Dynamic example = new T09_VBO_Dynamic())
{ {
// Get the title and category of this example using reflection. Utilities.SetWindowTitle(example);
ExampleAttribute info = ((ExampleAttribute)example.GetType().GetCustomAttributes(false)[0]);
example.Title = String.Format("OpenTK | {0} {1}: {2}", info.Category, info.Difficulty, info.Title);
example.Run(60.0, 0.0); example.Run(60.0, 0.0);
} }
} }