public static void Run()
{
using (var w = new GameWindow(720, 480, null, "ComGr", GameWindowFlags.Default, DisplayDevice.Default, 4, 0, OpenTK.Graphics.GraphicsContextFlags.ForwardCompatible))
{
int hProgram = 0;
int hTexture = 0;
int hHeight = 0;
int vaoTriangle = 0;
int[] triangleIndices = null;
int vboTriangleIndices = 0;
byte[] imageData;
byte[] heightData;
double time = 0;
int gridSize = 100;
w.Load += (o, ea) =>
{
//set up opengl
GL.ClearColor(0.5f, 0.5f, 0.5f, 0);
GL.ClearDepth(1);
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Less);
//GL.Enable(EnableCap.CullFace);
//load, compile and link shaders
//see https://www.khronos.org/opengl/wiki/Vertex_Shader
var VertexShaderSource = @"
#version 400 core
in vec3 pos;
in vec2 uvVertex;
uniform mat4 model;
uniform mat4 projection;
uniform sampler2D height;
out vec2 uvFragment;
out vec3 absolutePos;
out vec3 normalFragment;
float getHeight(in vec2 pos)
{
float h = texture(height, pos).x;
return log(h*30+1) * 8;
}
vec3 getNormal(in vec2 pos)
{
float offset = 1.0/float(textureSize(height,0).x);
vec2 xOff = vec2(offset, 0);
vec2 zOff = vec2(0, offset);
vec3 x = vec3(offset*2, getHeight(pos+xOff) - getHeight(pos-xOff), 0);
vec3 z = vec3(0, getHeight(pos+zOff) - getHeight(pos-zOff), offset*2);
return normalize(cross(z, x));
}
void main()
{
uvFragment = uvVertex;
absolutePos = (model * vec4(pos, 1)).xyz;
vec3 n = getNormal(uvVertex);
normalFragment = normalize((model * vec4(n, 0)).xyz);
vec3 p = pos;
p.y = getHeight(uvVertex);
gl_Position = projection * vec4(p,1);
}
";
var hVertexShader = GL.CreateShader(ShaderType.VertexShader);
GL.ShaderSource(hVertexShader, VertexShaderSource);
GL.CompileShader(hVertexShader);
GL.GetShader(hVertexShader, ShaderParameter.CompileStatus, out int status);
if (status != 1)
{
throw new Exception(GL.GetShaderInfoLog(hVertexShader));
}
//see https://www.khronos.org/opengl/wiki/Fragment_Shader
var FragmentShaderSource = @"
#version 400 core
uniform sampler2D tex;
in vec3 absolutePos;
in vec2 uvFragment;
in vec3 lightPos;
in vec3 normalFragment;
out vec4 color;
void main()
{
vec4 col = texture(tex, uvFragment);
vec3 lightPos = vec3(2, 7, 0);
vec3 toLight = normalize(lightPos - absolutePos);
float diffuse = max(0, dot(toLight, normalFragment));
vec3 eye = vec3(0, 0, 0);
vec3 viewDir = normalize(absolutePos - eye);
vec3 specularDir = normalFragment * (2 * dot(normalFragment, toLight)) - toLight;
specularDir = normalize(specularDir);
vec3 specular = vec3(0.8) * pow(max(0.0, -dot(specularDir, viewDir)), 5);
color = vec4(0.1)*col + diffuse * col + vec4(specular, 1);
}
";
var hFragmentShader = GL.CreateShader(ShaderType.FragmentShader);
GL.ShaderSource(hFragmentShader, FragmentShaderSource);
GL.CompileShader(hFragmentShader);
GL.GetShader(hFragmentShader, ShaderParameter.CompileStatus, out status);
if (status != 1)
{
throw new Exception(GL.GetShaderInfoLog(hFragmentShader));
}
//link shaders to a program
hProgram = GL.CreateProgram();
GL.AttachShader(hProgram, hFragmentShader);
GL.AttachShader(hProgram, hVertexShader);
GL.LinkProgram(hProgram);
GL.GetProgram(hProgram, GetProgramParameterName.LinkStatus, out status);
if (status != 1)
{
throw new Exception(GL.GetProgramInfoLog(hProgram));
}
var triangleVertices = new float[(gridSize + 1) * (gridSize + 1) * 3];
var uvs = new float[(gridSize + 1) * (gridSize + 1) * 2];
triangleIndices = new int[gridSize * gridSize * 2 * 3];
for (int i = 0; i < gridSize + 1; i++)
{
for (int j = 0; j < gridSize + 1; j++)
{
triangleVertices[((gridSize + 1) * i + j) * 3 + 0] = i;
triangleVertices[((gridSize + 1) * i + j) * 3 + 1] = 0;
triangleVertices[((gridSize + 1) * i + j) * 3 + 2] = j;
uvs[((gridSize + 1) * i + j) * 2 + 0] = i / (float)gridSize;
uvs[((gridSize + 1) * i + j) * 2 + 1] = j / (float)gridSize;
}
}
for (int i = 0; i < gridSize; i++)
{
for (int j = 0; j < gridSize; j++)
{
triangleIndices[(gridSize * i + j) * 6 + 0] = ((gridSize + 1) * i + j) + (gridSize + 1) * 0 + 0;
triangleIndices[(gridSize * i + j) * 6 + 1] = ((gridSize + 1) * i + j) + (gridSize + 1) * 0 + 1;
triangleIndices[(gridSize * i + j) * 6 + 2] = ((gridSize + 1) * i + j) + (gridSize + 1) * 1 + 0;
triangleIndices[(gridSize * i + j) * 6 + 3] = ((gridSize + 1) * i + j) + (gridSize + 1) * 1 + 0;
triangleIndices[(gridSize * i + j) * 6 + 4] = ((gridSize + 1) * i + j) + (gridSize + 1) * 0 + 1;
triangleIndices[(gridSize * i + j) * 6 + 5] = ((gridSize + 1) * i + j) + (gridSize + 1) * 1 + 1;
}
}
//upload model vertices to a vbo
var vboTriangleVertices = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vboTriangleVertices);
GL.BufferData(BufferTarget.ArrayBuffer, triangleVertices.Length * sizeof(float), triangleVertices, BufferUsageHint.StaticDraw);
// upload model indices to a vbo
vboTriangleIndices = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, vboTriangleIndices);
GL.BufferData(BufferTarget.ElementArrayBuffer, triangleIndices.Length * sizeof(int), triangleIndices, BufferUsageHint.StaticDraw);
var vboUvs = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vboUvs);
GL.BufferData(BufferTarget.ArrayBuffer, uvs.Length * sizeof(float), uvs, BufferUsageHint.StaticDraw);
//set up a vao
vaoTriangle = GL.GenVertexArray();
GL.BindVertexArray(vaoTriangle);
GL.EnableVertexAttribArray(GL.GetAttribLocation(hProgram, "pos"));
GL.BindBuffer(BufferTarget.ArrayBuffer, vboTriangleVertices);
GL.VertexAttribPointer(GL.GetAttribLocation(hProgram, "pos"), 3, VertexAttribPointerType.Float, false, 0, 0);
GL.EnableVertexAttribArray(GL.GetAttribLocation(hProgram, "uvVertex"));
GL.BindBuffer(BufferTarget.ArrayBuffer, vboUvs);
GL.VertexAttribPointer(GL.GetAttribLocation(hProgram, "uvVertex"), 2, VertexAttribPointerType.Float, false, 0, 0);
var image = new Bitmap("./stones.bmp");
var imageW = image.Width;
var h = image.Height;
imageData = new byte[imageW * h * 3];
BitmapData data = image.LockBits(new Rectangle(0, 0, imageW, h), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
unsafe
{
byte *p = (byte *)data.Scan0;
for (int i = 0; i < imageW * h * 3; i += 3)
{
imageData[i] = *(p++); //r
imageData[i + 1] = *(p++); //g
imageData[i + 2] = *(p++); //b
}
image.UnlockBits(data);
}
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
GL.GenTextures(1, out hTexture);
GL.BindTexture(TextureTarget.Texture2D, hTexture);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Srgb8, image.Width, image.Height, 0, OpenTK.Graphics.OpenGL4.PixelFormat.Rgb, PixelType.UnsignedByte, imageData);
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
image = new Bitmap("./height.bmp");
imageW = image.Width;
h = image.Height;
heightData = new byte[imageW * h * 3];
data = image.LockBits(new Rectangle(0, 0, imageW, h), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
unsafe
{
byte *p = (byte *)data.Scan0;
for (int i = 0; i < imageW * h * 3; i += 3)
{
heightData[i] = *(p++); //r
heightData[i + 1] = *(p++); //g
heightData[i + 2] = *(p++); //b
}
image.UnlockBits(data);
}
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
GL.GenTextures(1, out hHeight);
GL.BindTexture(TextureTarget.Texture2D, hHeight);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Srgb8, image.Width, image.Height, 0, OpenTK.Graphics.OpenGL4.PixelFormat.Rgb, PixelType.UnsignedByte, heightData);
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
{
//check for errors during all previous calls
var error = GL.GetError();
if (error != ErrorCode.NoError)
{
throw new Exception(error.ToString());
}
}
};
w.UpdateFrame += (o, fea) =>
{
//perform logic
time += fea.Time;
};
w.RenderFrame += (o, fea) =>
{
//clear screen and z-buffer
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
//switch to our shader
GL.UseProgram(hProgram);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, hTexture);
GL.Uniform1(GL.GetUniformLocation(hProgram, "tex"), 0);
GL.ActiveTexture(TextureUnit.Texture1);
GL.BindTexture(TextureTarget.Texture2D, hHeight);
GL.Uniform1(GL.GetUniformLocation(hProgram, "height"), 1);
var scale = Matrix4.CreateScale(5f / gridSize);
var transCenter = Matrix4.CreateTranslation(-gridSize / 2, 0f, -gridSize / 2);
var rotate = Matrix4x4.CreateFromYawPitchRoll((float)time / 2, 0, 0).ToGlMatrix();
var tilt = Matrix4x4.CreateFromYawPitchRoll(0, 0.2f, 0).ToGlMatrix();
var translate = Matrix4.CreateTranslation(0f, -1.5f, -5f);
var perspective = Matrix4.CreatePerspectiveFieldOfView((float)Math.PI / 2, 1, 1, 100);
var allTransforms = transCenter * scale * rotate * tilt * translate;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "model"), false, ref allTransforms);
allTransforms = allTransforms * perspective;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "projection"), false, ref allTransforms);
//render our model
GL.BindVertexArray(vaoTriangle);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, vboTriangleIndices);
GL.DrawElements(PrimitiveType.Triangles, triangleIndices.Length, DrawElementsType.UnsignedInt, 0);
//display
w.SwapBuffers();
var error = GL.GetError();
if (error != ErrorCode.NoError)
{
throw new Exception(error.ToString());
}
};
w.Resize += (o, ea) =>
{
GL.Viewport(w.ClientRectangle);
};
w.Run();
}
}
public static void Run()
{
using (var w = new GameWindow(720, 480, null, "ComGr", GameWindowFlags.Default, DisplayDevice.Default, 4, 0, OpenTK.Graphics.GraphicsContextFlags.ForwardCompatible))
{
int hProgram = 0;
int hTexture = 0;;
int vaoTriangle = 0;
int[] triangleIndices = null;
int vboTriangleIndices = 0;
byte[] imageData;
double time = 0;
w.Load += (o, ea) =>
{
//set up opengl
GL.ClearColor(0.5f, 0.5f, 0.5f, 0);
GL.ClearDepth(1);
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Less);
//GL.Enable(EnableCap.CullFace);
//load, compile and link shaders
//see https://www.khronos.org/opengl/wiki/Vertex_Shader
var VertexShaderSource = @"
#version 400 core
in vec3 pos;
in vec3 col;
in vec2 uvVertex;
in vec3 normalVertex;
uniform mat4 model;
uniform mat4 projection;
out vec3 vertexColor;
out vec2 uvFragment;
out vec3 absolutePos;
out vec3 normalFragment;
void main()
{
uvFragment = uvVertex;
vertexColor = col;
normalFragment = (model * vec4(normalVertex,0)).xyz;
absolutePos = (model * vec4(pos,1)).xyz;
gl_Position = projection * vec4(pos,1);
}
";
var hVertexShader = GL.CreateShader(ShaderType.VertexShader);
GL.ShaderSource(hVertexShader, VertexShaderSource);
GL.CompileShader(hVertexShader);
GL.GetShader(hVertexShader, ShaderParameter.CompileStatus, out int status);
if (status != 1)
{
throw new Exception(GL.GetShaderInfoLog(hVertexShader));
}
//see https://www.khronos.org/opengl/wiki/Fragment_Shader
var FragmentShaderSource = @"
#version 400 core
uniform sampler2D tex;
in vec3 absolutePos;
in vec3 vertexColor;
in vec2 uvFragment;
in vec3 lightPos;
in vec3 normalFragment;
out vec4 color;
void main()
{
vec4 texColor = texture(tex, uvFragment);
vec4 col = vec4(vertexColor, 1.0) * texColor;
vec3 lightPos = vec3(2, 3, 0);
vec3 toLight = normalize(lightPos - absolutePos);
float diffuse = max(0, dot(toLight, normalFragment));
vec3 eye = vec3(0, 0, 0);
vec3 viewDir = normalize(absolutePos - eye);
vec3 specularDir = normalFragment * (2 * dot(normalFragment, toLight)) - toLight;
specularDir = normalize(specularDir);
vec3 specular = vec3(0.8) * pow(max(0.0, -dot(specularDir, viewDir)), 50);
color = vec4(0.2)*col + diffuse * col + vec4(specular, 1);
}
";
var hFragmentShader = GL.CreateShader(ShaderType.FragmentShader);
GL.ShaderSource(hFragmentShader, FragmentShaderSource);
GL.CompileShader(hFragmentShader);
GL.GetShader(hFragmentShader, ShaderParameter.CompileStatus, out status);
if (status != 1)
{
throw new Exception(GL.GetShaderInfoLog(hFragmentShader));
}
//link shaders to a program
hProgram = GL.CreateProgram();
GL.AttachShader(hProgram, hFragmentShader);
GL.AttachShader(hProgram, hVertexShader);
GL.LinkProgram(hProgram);
GL.GetProgram(hProgram, GetProgramParameterName.LinkStatus, out status);
if (status != 1)
{
throw new Exception(GL.GetProgramInfoLog(hProgram));
}
//upload model vertices to a vbo
var triangleVertices = new float[]
{ //top
-1, -1, -1,
+1, -1, -1,
+1, +1, -1,
-1, +1, -1,
//bottom
-1, -1, +1,
+1, -1, +1,
+1, +1, +1,
-1, +1, +1,
//left
-1, -1, -1,
-1, +1, -1,
-1, +1, +1,
-1, -1, +1,
//right
+1, +1, -1,
+1, -1, -1,
+1, -1, +1,
+1, +1, +1,
//front
-1, +1, -1,
+1, +1, -1,
+1, +1, +1,
-1, +1, +1,
//back
+1, -1, -1,
-1, -1, -1,
-1, -1, +1,
+1, -1, +1,
};
var vboTriangleVertices = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vboTriangleVertices);
GL.BufferData(BufferTarget.ArrayBuffer, triangleVertices.Length * sizeof(float), triangleVertices, BufferUsageHint.StaticDraw);
triangleIndices = new int[]
{
0, 1, 2,
0, 2, 3,
7, 6, 5,
7, 5, 4,
8, 9, 10,
8, 10, 11,
12, 13, 14,
12, 14, 15,
16, 17, 18,
16, 18, 19,
20, 21, 22,
20, 22, 23,
};
// upload model indices to a vbo
vboTriangleIndices = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, vboTriangleIndices);
GL.BufferData(BufferTarget.ElementArrayBuffer, triangleIndices.Length * sizeof(int), triangleIndices, BufferUsageHint.StaticDraw);
var colors = new float[]
{
0, 1, 1,
1, 0, 1,
1, 1, 0,
0, 0, 1,
0, 1, 0,
1, 0, 0,
0, 0, 0,
1, 1, 1,
0, 1, 1,
0, 0, 1,
1, 1, 1,
0, 1, 1,
1, 1, 0,
1, 0, 1,
1, 0, 0,
0, 0, 0,
0, 0, 1,
1, 1, 0,
0, 0, 0,
1, 1, 1,
1, 0, 1,
0, 1, 1,
0, 1, 0,
1, 0, 0
};
var vboColor = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vboColor);
GL.BufferData(BufferTarget.ArrayBuffer, colors.Length * sizeof(float), colors, BufferUsageHint.StaticDraw);
var uvs = new float[]
{
0, 1,
1, 1,
1, 0,
0, 0,
0, 1,
1, 1,
1, 0,
0, 0,
0, 1,
1, 1,
1, 0,
0, 0,
0, 1,
1, 1,
1, 0,
0, 0,
0, 1,
1, 1,
1, 0,
0, 0,
0, 1,
1, 1,
1, 0,
0, 0,
};
var vboUvs = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vboUvs);
GL.BufferData(BufferTarget.ArrayBuffer, uvs.Length * sizeof(float), uvs, BufferUsageHint.StaticDraw);
var normals = new float[]
{
0, 0, -1,
0, 0, -1,
0, 0, -1,
0, 0, -1,
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, 0, 0,
1, 0, 0,
1, 0, 0,
1, 0, 0,
0, 1, 0,
0, 1, 0,
0, 1, 0,
0, 1, 0,
0, -1, 0,
0, -1, 0,
0, -1, 0,
0, -1, 0,
};
var vboNorms = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, vboNorms);
GL.BufferData(BufferTarget.ArrayBuffer, normals.Length * sizeof(float), normals, BufferUsageHint.StaticDraw);
//set up a vao
vaoTriangle = GL.GenVertexArray();
GL.BindVertexArray(vaoTriangle);
GL.EnableVertexAttribArray(GL.GetAttribLocation(hProgram, "pos"));
GL.BindBuffer(BufferTarget.ArrayBuffer, vboTriangleVertices);
GL.VertexAttribPointer(GL.GetAttribLocation(hProgram, "pos"), 3, VertexAttribPointerType.Float, false, 0, 0);
GL.EnableVertexAttribArray(GL.GetAttribLocation(hProgram, "col"));
GL.BindBuffer(BufferTarget.ArrayBuffer, vboColor);
GL.VertexAttribPointer(GL.GetAttribLocation(hProgram, "col"), 3, VertexAttribPointerType.Float, false, 0, 0);
GL.EnableVertexAttribArray(GL.GetAttribLocation(hProgram, "uvVertex"));
GL.BindBuffer(BufferTarget.ArrayBuffer, vboUvs);
GL.VertexAttribPointer(GL.GetAttribLocation(hProgram, "uvVertex"), 2, VertexAttribPointerType.Float, false, 0, 0);
GL.EnableVertexAttribArray(GL.GetAttribLocation(hProgram, "normalVertex"));
GL.BindBuffer(BufferTarget.ArrayBuffer, vboNorms);
GL.VertexAttribPointer(GL.GetAttribLocation(hProgram, "normalVertex"), 3, VertexAttribPointerType.Float, false, 0, 0);
var image = new Bitmap("./stones.bmp");
var imageW = image.Width;
var h = image.Height;
imageData = new byte[imageW * h * 3];
BitmapData data = image.LockBits(new Rectangle(0, 0, imageW, h), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
unsafe
{
byte *p = (byte *)data.Scan0;
for (int i = 0; i < imageW * h * 3; i += 3)
{
imageData[i] = *(p++); //r
imageData[i + 1] = *(p++); //g
imageData[i + 2] = *(p++); //b
}
image.UnlockBits(data);
}
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
GL.GenTextures(1, out hTexture);
GL.BindTexture(TextureTarget.Texture2D, hTexture);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Srgb8, image.Width, image.Height, 0, OpenTK.Graphics.OpenGL4.PixelFormat.Rgb, PixelType.UnsignedByte, imageData);
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
{
//check for errors during all previous calls
var error = GL.GetError();
if (error != ErrorCode.NoError)
{
throw new Exception(error.ToString());
}
}
};
w.UpdateFrame += (o, fea) =>
{
//perform logic
time += fea.Time;
};
w.RenderFrame += (o, fea) =>
{
//clear screen and z-buffer
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
//switch to our shader
GL.UseProgram(hProgram);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, hTexture);
GL.Uniform1(GL.GetAttribLocation(hProgram, "tex"), 0);
var scale = Matrix4.CreateScale(1f);
var rotate = Matrix4x4.CreateFromYawPitchRoll((float)time * 0.5f, (float)time, (float)time).ToGlMatrix();
var translate = Matrix4.CreateTranslation(0f, 0f, -5f);
var perspective = Matrix4.CreatePerspectiveFieldOfView((float)Math.PI / 2, 1, 1, 100);
var allTransforms = rotate * scale * translate;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "model"), false, ref allTransforms);
allTransforms = allTransforms * perspective;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "projection"), false, ref allTransforms);
//render our model
GL.BindVertexArray(vaoTriangle);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, vboTriangleIndices);
GL.DrawElements(PrimitiveType.Triangles, triangleIndices.Length, DrawElementsType.UnsignedInt, 0);
rotate = Matrix4x4.CreateFromYawPitchRoll((float)time, (float)time * 0.5f, (float)time).ToGlMatrix();
translate = Matrix4.CreateTranslation(2f, 2f, -5f);
allTransforms = rotate * scale * translate;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "model"), false, ref allTransforms);
allTransforms = allTransforms * perspective;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "projection"), false, ref allTransforms);
//render our model
GL.BindVertexArray(vaoTriangle);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, vboTriangleIndices);
GL.DrawElements(PrimitiveType.Triangles, triangleIndices.Length, DrawElementsType.UnsignedInt, 0);
rotate = Matrix4x4.CreateFromYawPitchRoll((float)time, (float)time, (float)time * 0.5f).ToGlMatrix();
translate = Matrix4.CreateTranslation(-2f, -2f, -5f);
perspective = Matrix4.CreatePerspectiveFieldOfView((float)Math.PI / 2f, 1, 1, 100);
allTransforms = rotate * scale * translate;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "model"), false, ref allTransforms);
allTransforms = allTransforms * perspective;
GL.UniformMatrix4(GL.GetUniformLocation(hProgram, "projection"), false, ref allTransforms);
//render our model
GL.BindVertexArray(vaoTriangle);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, vboTriangleIndices);
GL.DrawElements(PrimitiveType.Triangles, triangleIndices.Length, DrawElementsType.UnsignedInt, 0);
//display
w.SwapBuffers();
var error = GL.GetError();
if (error != ErrorCode.NoError)
{
throw new Exception(error.ToString());
}
};
w.Resize += (o, ea) =>
{
GL.Viewport(w.ClientRectangle);
};
w.Run();
}
}
