public Application(IDefault page = null)
{
var size = 500;
var gl = new WebGLRenderingContext();
var canvas = gl.canvas.AttachToDocument();
Native.document.body.style.overflow = IStyle.OverflowEnum.hidden;
canvas.style.SetLocation(0, 0, size, size);
canvas.width = size;
canvas.height = size;
var gl_viewportWidth = size;
var gl_viewportHeight = size;
#region IsDisposed
var IsDisposed = false;
this.Dispose = delegate
{
if (IsDisposed)
return;
IsDisposed = true;
canvas.Orphanize();
};
#endregion
#region AtResize
Action AtResize =
delegate
{
gl_viewportWidth = Native.window.Width;
gl_viewportHeight = Native.window.Height;
canvas.style.SetLocation(0, 0, gl_viewportWidth, gl_viewportHeight);
canvas.width = gl_viewportWidth;
canvas.height = gl_viewportHeight;
};
Native.window.onresize +=
e =>
{
AtResize();
};
AtResize();
#endregion
#region requestFullscreen
Native.Document.body.ondblclick +=
delegate
{
if (IsDisposed)
return;
// http://tutorialzine.com/2012/02/enhance-your-website-fullscreen-api/
Native.Document.body.requestFullscreen();
};
#endregion
#region initShaders
var shaderProgram = gl.createProgram(
new GeometryVertexShader(),
new GeometryFragmentShader()
);
gl.linkProgram(shaderProgram);
gl.useProgram(shaderProgram);
var shaderProgram_vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray((uint)shaderProgram_vertexPositionAttribute);
var shaderProgram_textureCoordAttribute = gl.getAttribLocation(shaderProgram, "aTextureCoord");
gl.enableVertexAttribArray((uint)shaderProgram_textureCoordAttribute);
var shaderProgram_pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
var shaderProgram_mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
// new in lesson 05
var shaderProgram_samplerUniform = gl.getUniformLocation(shaderProgram, "uSampler");
#endregion
var mvMatrix = glMatrix.mat4.create();
var mvMatrixStack = new Stack<Float32Array>();
var pMatrix = glMatrix.mat4.create();
#region new in lesson 03
Action mvPushMatrix = delegate
{
var copy = glMatrix.mat4.create();
glMatrix.mat4.set(mvMatrix, copy);
mvMatrixStack.Push(copy);
};
Action mvPopMatrix = delegate
{
mvMatrix = mvMatrixStack.Pop();
};
#endregion
#region setMatrixUniforms
Action setMatrixUniforms =
delegate
{
gl.uniformMatrix4fv(shaderProgram_pMatrixUniform, false, pMatrix);
gl.uniformMatrix4fv(shaderProgram_mvMatrixUniform, false, mvMatrix);
};
#endregion
#region init buffers
#region cubeVertexPositionBuffer
var cubeVertexPositionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexPositionBuffer);
var vertices = new[]{
// Front face RED
-1.0f, -1.0f, 1.0f,
1.0f, -1.0f, 1.0f,
1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 1.0f,
// Back face YELLOW
-1.0f, -1.0f, -1.0f,
-1.0f, 1.0f, -1.0f,
1.0f, 1.0f, -1.0f,
1.0f, -1.0f, -1.0f,
// Top face GREEN
-1.0f, 1.0f, -1.0f,
-1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f,
1.0f, 1.0f, -1.0f,
// Bottom face BEIGE
-1.0f, -1.0f, -1.0f,
1.0f, -1.0f, -1.0f,
1.0f, -1.0f, 1.0f,
-1.0f, -1.0f, 1.0f,
// Right face PURPLE
1.0f, -1.0f, -1.0f,
1.0f, 1.0f, -1.0f,
1.0f, 1.0f, 1.0f,
1.0f, -1.0f, 1.0f,
// Left face
-1.0f, -1.0f, -1.0f,
-1.0f, -1.0f, 1.0f,
-1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, -1.0f
};
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);
var cubeVertexPositionBuffer_itemSize = 3;
var cubeVertexPositionBuffer_numItems = 6 * 6;
#endregion
#region cubeVertexTextureCoordBuffer
var cubeVertexTextureCoordBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexTextureCoordBuffer);
var textureCoords = new float[]{
// Front face
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
// Back face
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
// Top face
0.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
// Bottom face
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
// Right face
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
// Left face
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
};
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(textureCoords), gl.STATIC_DRAW);
var cubeVertexTextureCoordBuffer_itemSize = 2;
var cubeVertexTextureCoordBuffer_numItems = 24;
var cubeVertexIndexBuffer = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
var cubeVertexIndices = new UInt16[]{
0, 1, 2, 0, 2, 3, // Front face
4, 5, 6, 4, 6, 7, // Back face
8, 9, 10, 8, 10, 11, // Top face
12, 13, 14, 12, 14, 15, // Bottom face
16, 17, 18, 16, 18, 19, // Right face
20, 21, 22, 20, 22, 23 // Left face
};
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(cubeVertexIndices), gl.STATIC_DRAW);
var cubeVertexIndexBuffer_itemSize = 1;
var cubeVertexIndexBuffer_numItems = cubeVertexPositionBuffer_numItems;
#endregion
#endregion
// initTexture new in lesson 05
var neheTexture = gl.createTexture();
var neheTexture_image = new WebGLLesson05.HTML.Images.FromAssets.nehe();
neheTexture_image.InvokeOnComplete(
delegate
{
gl.bindTexture(gl.TEXTURE_2D, neheTexture);
#region with neheTexture
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, neheTexture_image);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, (int)gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, (int)gl.NEAREST);
#endregion
gl.bindTexture(gl.TEXTURE_2D, null);
gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
gl.enable(gl.DEPTH_TEST);
#region new in lesson 04
var xRot = 0.0f;
var yRot = 0.0f;
var zRot = 0.0f;
var lastTime = 0L;
Action animate = delegate
{
var timeNow = new IDate().getTime();
if (lastTime != 0)
{
var elapsed = timeNow - lastTime;
xRot += (90 * elapsed) / 1000.0f;
yRot += (90 * elapsed) / 1000.0f;
zRot += (90 * elapsed) / 1000.0f;
}
lastTime = timeNow;
};
Func<float, float> degToRad = (degrees) =>
{
return degrees * (f)Math.PI / 180f;
};
#endregion
#region drawScene
Action drawScene = delegate
{
gl.viewport(0, 0, gl_viewportWidth, gl_viewportHeight);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
glMatrix.mat4.perspective(45f, (float)gl_viewportWidth / (float)gl_viewportHeight, 0.1f, 100.0f, pMatrix);
glMatrix.mat4.identity(mvMatrix);
glMatrix.mat4.translate(mvMatrix, new float[] { 0.0f, 0.0f, -5.0f });
glMatrix.mat4.rotate(mvMatrix, degToRad(xRot), new[] { 1f, 0f, 0f });
glMatrix.mat4.rotate(mvMatrix, degToRad(yRot), new[] { 0f, 1f, 0f });
glMatrix.mat4.rotate(mvMatrix, degToRad(zRot), new[] { 0f, 0f, 1f });
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexPositionBuffer);
gl.vertexAttribPointer((uint)shaderProgram_vertexPositionAttribute, cubeVertexPositionBuffer_itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexTextureCoordBuffer);
gl.vertexAttribPointer((uint)shaderProgram_textureCoordAttribute, cubeVertexTextureCoordBuffer_itemSize, gl.FLOAT, false, 0, 0);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, neheTexture);
gl.uniform1i(shaderProgram_samplerUniform, 0);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
setMatrixUniforms();
gl.drawElements(gl.TRIANGLES, cubeVertexIndexBuffer_numItems, gl.UNSIGNED_SHORT, 0);
};
drawScene();
#endregion
var c = 0;
Native.window.onframe += delegate
{
c++;
Native.document.title = "" + c;
drawScene();
animate();
};
}
);
}
public Application(IDefault page = null)
{
var size = 500;
var gl = new WebGLRenderingContext();
var canvas = gl.canvas.AttachToDocument();
Native.document.body.style.overflow = IStyle.OverflowEnum.hidden;
canvas.style.SetLocation(0, 0, size, size);
canvas.width = size;
canvas.height = size;
var gl_viewportWidth = size;
var gl_viewportHeight = size;
#region IsDisposed
var IsDisposed = false;
this.Dispose = delegate
{
if (IsDisposed)
{
return;
}
IsDisposed = true;
canvas.Orphanize();
};
#endregion
#region AtResize
Action AtResize =
delegate
{
gl_viewportWidth = Native.window.Width;
gl_viewportHeight = Native.window.Height;
canvas.style.SetLocation(0, 0, gl_viewportWidth, gl_viewportHeight);
canvas.width = gl_viewportWidth;
canvas.height = gl_viewportHeight;
};
Native.window.onresize +=
e =>
{
AtResize();
};
AtResize();
#endregion
#region requestFullscreen
Native.Document.body.ondblclick +=
delegate
{
if (IsDisposed)
{
return;
}
// http://tutorialzine.com/2012/02/enhance-your-website-fullscreen-api/
Native.Document.body.requestFullscreen();
};
#endregion
#region initShaders
var shaderProgram = gl.createProgram(
new GeometryVertexShader(),
new GeometryFragmentShader()
);
gl.linkProgram(shaderProgram);
gl.useProgram(shaderProgram);
var shaderProgram_vertexPositionAttribute = gl.getAttribLocation(shaderProgram, "aVertexPosition");
gl.enableVertexAttribArray((uint)shaderProgram_vertexPositionAttribute);
var shaderProgram_textureCoordAttribute = gl.getAttribLocation(shaderProgram, "aTextureCoord");
gl.enableVertexAttribArray((uint)shaderProgram_textureCoordAttribute);
var shaderProgram_pMatrixUniform = gl.getUniformLocation(shaderProgram, "uPMatrix");
var shaderProgram_mvMatrixUniform = gl.getUniformLocation(shaderProgram, "uMVMatrix");
// new in lesson 05
var shaderProgram_samplerUniform = gl.getUniformLocation(shaderProgram, "uSampler");
#endregion
var mvMatrix = glMatrix.mat4.create();
var mvMatrixStack = new Stack <Float32Array>();
var pMatrix = glMatrix.mat4.create();
#region new in lesson 03
Action mvPushMatrix = delegate
{
var copy = glMatrix.mat4.create();
glMatrix.mat4.set(mvMatrix, copy);
mvMatrixStack.Push(copy);
};
Action mvPopMatrix = delegate
{
mvMatrix = mvMatrixStack.Pop();
};
#endregion
#region setMatrixUniforms
Action setMatrixUniforms =
delegate
{
gl.uniformMatrix4fv(shaderProgram_pMatrixUniform, false, pMatrix);
gl.uniformMatrix4fv(shaderProgram_mvMatrixUniform, false, mvMatrix);
};
#endregion
#region init buffers
#region cubeVertexPositionBuffer
var cubeVertexPositionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexPositionBuffer);
var vertices = new[] {
// Front face RED
-1.0f, -1.0f, 1.0f,
1.0f, -1.0f, 1.0f,
1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 1.0f,
// Back face YELLOW
-1.0f, -1.0f, -1.0f,
-1.0f, 1.0f, -1.0f,
1.0f, 1.0f, -1.0f,
1.0f, -1.0f, -1.0f,
// Top face GREEN
-1.0f, 1.0f, -1.0f,
-1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f,
1.0f, 1.0f, -1.0f,
// Bottom face BEIGE
-1.0f, -1.0f, -1.0f,
1.0f, -1.0f, -1.0f,
1.0f, -1.0f, 1.0f,
-1.0f, -1.0f, 1.0f,
// Right face PURPLE
1.0f, -1.0f, -1.0f,
1.0f, 1.0f, -1.0f,
1.0f, 1.0f, 1.0f,
1.0f, -1.0f, 1.0f,
// Left face
-1.0f, -1.0f, -1.0f,
-1.0f, -1.0f, 1.0f,
-1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, -1.0f
};
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);
var cubeVertexPositionBuffer_itemSize = 3;
var cubeVertexPositionBuffer_numItems = 6 * 6;
#endregion
#region cubeVertexTextureCoordBuffer
var cubeVertexTextureCoordBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexTextureCoordBuffer);
var textureCoords = new float[] {
// Front face
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
// Back face
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
// Top face
0.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
// Bottom face
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
// Right face
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
// Left face
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
};
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(textureCoords), gl.STATIC_DRAW);
var cubeVertexTextureCoordBuffer_itemSize = 2;
var cubeVertexTextureCoordBuffer_numItems = 24;
var cubeVertexIndexBuffer = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
var cubeVertexIndices = new UInt16[] {
0, 1, 2, 0, 2, 3, // Front face
4, 5, 6, 4, 6, 7, // Back face
8, 9, 10, 8, 10, 11, // Top face
12, 13, 14, 12, 14, 15, // Bottom face
16, 17, 18, 16, 18, 19, // Right face
20, 21, 22, 20, 22, 23 // Left face
};
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(cubeVertexIndices), gl.STATIC_DRAW);
var cubeVertexIndexBuffer_itemSize = 1;
var cubeVertexIndexBuffer_numItems = cubeVertexPositionBuffer_numItems;
#endregion
#endregion
// initTexture new in lesson 05
var neheTexture = gl.createTexture();
var neheTexture_image = new WebGLLesson05.HTML.Images.FromAssets.nehe();
neheTexture_image.InvokeOnComplete(
delegate
{
gl.bindTexture(gl.TEXTURE_2D, neheTexture);
#region with neheTexture
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, neheTexture_image);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, (int)gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, (int)gl.NEAREST);
#endregion
gl.bindTexture(gl.TEXTURE_2D, null);
gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
gl.enable(gl.DEPTH_TEST);
#region new in lesson 04
var xRot = 0.0f;
var yRot = 0.0f;
var zRot = 0.0f;
var lastTime = 0L;
Action animate = delegate
{
var timeNow = new IDate().getTime();
if (lastTime != 0)
{
var elapsed = timeNow - lastTime;
xRot += (90 * elapsed) / 1000.0f;
yRot += (90 * elapsed) / 1000.0f;
zRot += (90 * elapsed) / 1000.0f;
}
lastTime = timeNow;
};
Func <float, float> degToRad = (degrees) =>
{
return(degrees * (f)Math.PI / 180f);
};
#endregion
#region drawScene
Action drawScene = delegate
{
gl.viewport(0, 0, gl_viewportWidth, gl_viewportHeight);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
glMatrix.mat4.perspective(45f, (float)gl_viewportWidth / (float)gl_viewportHeight, 0.1f, 100.0f, pMatrix);
glMatrix.mat4.identity(mvMatrix);
glMatrix.mat4.translate(mvMatrix, new float[] { 0.0f, 0.0f, -5.0f });
glMatrix.mat4.rotate(mvMatrix, degToRad(xRot), new[] { 1f, 0f, 0f });
glMatrix.mat4.rotate(mvMatrix, degToRad(yRot), new[] { 0f, 1f, 0f });
glMatrix.mat4.rotate(mvMatrix, degToRad(zRot), new[] { 0f, 0f, 1f });
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexPositionBuffer);
gl.vertexAttribPointer((uint)shaderProgram_vertexPositionAttribute, cubeVertexPositionBuffer_itemSize, gl.FLOAT, false, 0, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, cubeVertexTextureCoordBuffer);
gl.vertexAttribPointer((uint)shaderProgram_textureCoordAttribute, cubeVertexTextureCoordBuffer_itemSize, gl.FLOAT, false, 0, 0);
gl.activeTexture(gl.TEXTURE0);
gl.bindTexture(gl.TEXTURE_2D, neheTexture);
gl.uniform1i(shaderProgram_samplerUniform, 0);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
setMatrixUniforms();
gl.drawElements(gl.TRIANGLES, cubeVertexIndexBuffer_numItems, gl.UNSIGNED_SHORT, 0);
};
drawScene();
#endregion
var c = 0;
Native.window.onframe += delegate
{
c++;
Native.document.title = "" + c;
drawScene();
animate();
};
}
);
}
