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private void Init(FrmScreenNative screen)
{
//screen.GlControl.MakeCurrent();
screen.MakeCurrent();
float[] vertices = {
-1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1,
-1, -1, 1, 1, -1, 1, 1, 1, 1, -1, 1, 1,
-1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1,
1, -1, -1, 1, 1, -1, 1, 1, 1, 1, -1, 1,
-1, -1, -1, -1, -1, 1, 1, -1, 1, 1, -1, -1,
-1, 1, -1, -1, 1, 1, 1, 1, 1, 1, 1, -1,
};
float[] colors = {
5, 3, 7, 5, 3, 7, 5, 3, 7, 5, 3, 7,
1, 1, 3, 1, 1, 3, 1, 1, 3, 1, 1, 3,
0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1,
1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0,
1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0,
0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0
};
indices = new ushort[]{
0, 1, 2, 0, 2, 3, 4, 5, 6, 4, 6, 7,
8, 9, 10, 8, 10, 11, 12, 13, 14, 12, 14, 15,
16, 17, 18, 16, 18, 19, 20, 21, 22, 20, 22, 23
};
// Create and store data into vertex buffer
int vertex_buffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vertex_buffer);
GL.BufferData(BufferTarget.ArrayBuffer, vertices.Length, vertices, BufferUsageHint.StaticDraw);
// Create and store data into color buffer
int color_buffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, color_buffer);
GL.BufferData(BufferTarget.ArrayBuffer, colors.Length, colors, BufferUsageHint.StaticDraw);
// Create and store data into index buffer
index_buffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, index_buffer);
GL.BufferData(BufferTarget.ArrayBuffer, indices.Length, indices, BufferUsageHint.StaticDraw);
string vertCode = @"
attribute vec3 position;
uniform mat4 Pmatrix;
uniform mat4 Vmatrix;
uniform mat4 Mmatrix;
attribute vec3 color;
varying vec3 vColor;
void main(void) {
gl_Position = Pmatrix*Vmatrix*Mmatrix*vec4(position, 1.);
vColor = color;
}";
string fragCode = @"
precision mediump float;
varying vec3 vColor;
void main(void) {
gl_FragColor = vec4(vColor, 1.);
}";
int vertShader = LoadShader(ShaderType.VertexShader, vertCode);
int fragShader = LoadShader(ShaderType.FragmentShader, fragCode);
int shaderProgram = GL.CreateProgram();
GL.AttachShader(shaderProgram, vertShader);
GL.AttachShader(shaderProgram, fragShader);
GL.LinkProgram(shaderProgram);
/* ====== Associating attributes to vertex shader =====*/
Pmatrix = GL.GetUniformLocation(shaderProgram, "Pmatrix");
Vmatrix = GL.GetUniformLocation(shaderProgram, "Vmatrix");
Mmatrix = GL.GetUniformLocation(shaderProgram, "Mmatrix");
GL.BindBuffer(BufferTarget.ArrayBuffer, vertex_buffer);
int position = GL.GetAttribLocation(shaderProgram, "position");
GL.VertexAttribPointer(position, 3, VertexAttribPointerType.Float, false, 0, 0);
// Position
GL.EnableVertexAttribArray(position);
GL.BindBuffer(BufferTarget.ArrayBuffer, color_buffer);
int color = GL.GetAttribLocation(shaderProgram, "color");
GL.VertexAttribPointer(color, 3, VertexAttribPointerType.Float, false, 0, 0);
// Color
GL.EnableVertexAttribArray(color);
GL.UseProgram(shaderProgram);
/*==================== MATRIX =====================*/
float fovyDeg = 40;
float fovyRad = (float)(fovyDeg * Math.PI / 180);
proj_matrix = Matrix4.CreatePerspectiveFieldOfView(fovyRad, (float)screen.Width / (float)screen.Height, 1, 100);
mov_matrix = Matrix4.Identity;
view_matrix = Matrix4.Identity;
// translating z
Matrix4 translateZ = Matrix4.CreateTranslation(0, 0, -6);
view_matrix = view_matrix + translateZ;
//screen.GlControl.Context.MakeCurrent(null);
screen.Context.MakeCurrent(null);
}
Matrix4 proj_matrix;
Matrix4 mov_matrix;
Matrix4 view_matrix;
int Pmatrix;
int Vmatrix;
int Mmatrix;
int index_buffer;
ushort[] indices;
private System.Diagnostics.Stopwatch m_swatch = new System.Diagnostics.Stopwatch();
private void Draw(FrmScreenNative screen)
{
screen.MakeCurrent();
var dt = this.m_swatch.ElapsedMilliseconds;
Matrix4 rotationX = Matrix4.CreateRotationX(dt * 0.005f);
Matrix4 rotationY = Matrix4.CreateRotationY(dt * 0.002f);
Matrix4 rotationZ = Matrix4.CreateRotationZ(dt * 0.003f);
mov_matrix += rotationX + rotationY + rotationZ;
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Lequal);
GL.ClearColor(0.5f, 0.5f, 0.5f, 0.9f);
GL.ClearDepth(1);
GL.Viewport(0, 0, screen.Width, screen.Height);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.UniformMatrix4(Pmatrix, false, ref proj_matrix);
GL.UniformMatrix4(Vmatrix, false, ref view_matrix);
GL.UniformMatrix4(Mmatrix, false, ref mov_matrix);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, index_buffer);
GL.DrawElements(BeginMode.Triangles, indices.Length, DrawElementsType.UnsignedShort, 0);
screen.SwapBuffers();
screen.Context.MakeCurrent(null);
} |
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