/// <summary>
/// Allocates and initializes OpenGL resources needed by the plane renderer. Must be
/// called on the OpenGL thread, typically in
/// {@link GLSurfaceView.Renderer#onSurfaceCreated(GL10, EGLConfig)}.
/// </summary>
public void CreateOnGlThread(Context context)
{
//ShaderHelper.CheckGLError(TAG, "before create");
var buffers = new int[1];
GLES20.GlGenBuffers(1, buffers, 0);
mVbo = buffers[0];
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVbo);
mVboSize = INITIAL_BUFFER_POINTS * BYTES_PER_POINT;
GLES20.GlBufferData(GLES20.GlArrayBuffer, mVboSize, null, GLES20.GlDynamicDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
var vertexShader = ShaderHelper.Load(TAG, context,
GLES20.GlVertexShader, Resource.Raw.point_cloud_vertex);
var passthroughShader = ShaderHelper.Load(TAG, context,
GLES20.GlFragmentShader, Resource.Raw.passthrough_fragment);
mProgramName = GLES20.GlCreateProgram();
GLES20.GlAttachShader(mProgramName, vertexShader);
GLES20.GlAttachShader(mProgramName, passthroughShader);
GLES20.GlLinkProgram(mProgramName);
GLES20.GlUseProgram(mProgramName);
mPositionAttribute = GLES20.GlGetAttribLocation(mProgramName, "a_Position");
mColorUniform = GLES20.GlGetUniformLocation(mProgramName, "u_Color");
mModelViewProjectionUniform = GLES20.GlGetUniformLocation(
mProgramName, "u_ModelViewProjection");
mPointSizeUniform = GLES20.GlGetUniformLocation(mProgramName, "u_PointSize");
}
/// <summary>
/// Create and build a shader for the hand skeleton points on the OpenGL thread.
/// this is called when HandRenderManager's OnSurfaceCreated.
/// </summary>
public void Init()
{
ShaderUtil.CheckGlError(TAG, "Init start.");
int[] buffers = new int[1];
GLES20.GlGenBuffers(1, buffers, 0);
mVbo = buffers[0];
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVbo);
mVboSize = INITIAL_POINTS_SIZE * BYTES_PER_POINT;
GLES20.GlBufferData(GLES20.GlArrayBuffer, mVboSize, null, GLES20.GlDynamicDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
CreateProgram();
ShaderUtil.CheckGlError(TAG, "Init end.");
}
/// <summary>
/// Initialize the OpenGL ES rendering related to face geometry,
/// including creating the shader program.
/// This method is called when FaceRenderManager's OnSurfaceCreated method calling.
/// </summary>
/// <param name="context">Context.</param>
public void Init(Context context)
{
ShaderUtil.CheckGlError(TAG, "Init start.");
int[] texNames = new int[1];
GLES20.GlActiveTexture(GLES20.GlTexture0);
GLES20.GlGenTextures(1, texNames, 0);
mTextureName = texNames[0];
int[] buffers = new int[BUFFER_OBJECT_NUMBER];
GLES20.GlGenBuffers(BUFFER_OBJECT_NUMBER, buffers, 0);
mVerticeId = buffers[0];
mTriangleId = buffers[1];
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVerticeId);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mVerticeBufferSize * BYTES_PER_POINT, null, GLES20.GlDynamicDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, mTriangleId);
// Each floating-point number occupies 4 bytes.
GLES20.GlBufferData(GLES20.GlElementArrayBuffer, mTriangleBufferSize * 4, null,
GLES20.GlDynamicDraw);
GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, 0);
GLES20.GlBindTexture(GLES20.GlTexture2d, mTextureName);
CreateProgram();
//Add texture to facegeometry.
Bitmap textureBitmap = null;
AssetManager assets = context.Assets;
try
{
Stream sr = assets.Open("face_geometry.png");
textureBitmap = BitmapFactory.DecodeStream(sr);
}
catch (Exception e)
{
Log.Debug(TAG, " Open bitmap error!");
}
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapS, GLES20.GlClampToEdge);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapT, GLES20.GlClampToEdge);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMinFilter, GLES20.GlLinearMipmapLinear);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMagFilter, GLES20.GlLinear);
GLUtils.TexImage2D(GLES20.GlTexture2d, 0, textureBitmap, 0);
GLES20.GlGenerateMipmap(GLES20.GlTexture2d);
GLES20.GlBindTexture(GLES20.GlTexture2d, 0);
ShaderUtil.CheckGlError(TAG, "Init end.");
}
/// <summary>
/// Create and build a shader for the hand gestures on the OpenGL thread.
/// This method is called when HandRenderManager's OnSurfaceCreated.
/// </summary>
public void Init()
{
ShaderUtil.CheckGlError(TAG, "Init start.");
mMVPMatrix = MatrixUtil.GetOriginalMatrix();
int[] buffers = new int[1];
GLES20.GlGenBuffers(1, buffers, 0);
mVbo = buffers[0];
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVbo);
CreateProgram();
GLES20.GlBufferData(GLES20.GlArrayBuffer, mVboSize, null, GLES20.GlDynamicDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
ShaderUtil.CheckGlError(TAG, "Init end.");
}
private void ArrayToVBO(Array source, int size)
{
float[] floatArray = new float[size / 4];
System.Buffer.BlockCopy(source, 0, floatArray, 0, (int)size);
//temp Cut vertex
int cutSize = 0;
for (int i = 0; i < size / 4; i += 3)
{
if (floatArray[i + 1] < 20.0f)
{
cutSize++;
}
}
float[] cutArray = new float[cutSize * 3];
int cutArrayIndex = 0;
for (int i = 0; i < size / 4; i += 3)
{
if (floatArray[i + 1] < 20.0f)
{
cutArray[cutArrayIndex] = floatArray[i];
cutArray[cutArrayIndex + 1] = floatArray[i + 1];
cutArray[cutArrayIndex + 2] = floatArray[i + 2];
cutArrayIndex += 3;
}
}
size = cutSize * 3 * 4;
objectSize = (int)(size / 4 / 3);
FloatBuffer vertexBuffer;
vertexBuffer = FloatBuffer.Allocate((int)size / 4); // float array to
vertexBuffer.Put(cutArray, 0, (int)size / 4);
vertexBuffer.Flip();
GLES20.GlGenBuffers(1, VBOBuffers, 0);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[0]);
//VBOManager.setSize(fileName, vertexBuffer.Capacity() / 4); //is size of vertex count = 1 vertex 4 float x,y,z, 1
GLES20.GlBufferData(GLES20.GlArrayBuffer, vertexBuffer.Capacity() * mBytesPerFloat, vertexBuffer, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
handle = VBOBuffers[0];
floatArray = null;
vertexBuffer = null;
}
public static int[] getVBO(String name)
{
foreach (VBOItem vboItem in VBOItems)
{
if (vboItem.name.CompareTo(name) == 0)
{
return(vboItem.VBO);
}
}
VBOItem newVBOItem = new VBOItem(name);
GLES20.GlGenBuffers(3, newVBOItem.VBO, 0);
VBOItems.Add(newVBOItem);
return(newVBOItem.VBO);
}
/// <summary>
/// Create a shader program to read the data of the virtual object.
/// This method is called when WorldRenderManager's OnSurfaceCreated.
/// </summary>
/// <param name="context">Context.</param>
public void Init(Context context)
{
ShaderUtil.CheckGlError(TAG, "Init start.");
CreateProgram();
// Coordinate and index.
int[] buffers = new int[2];
GLES20.GlGenBuffers(2, buffers, 0);
mVertexBufferId = buffers[0];
mIndexBufferId = buffers[1];
GLES20.GlActiveTexture(GLES20.GlTexture0);
GLES20.GlGenTextures(mTextures.Length, mTextures, 0);
GLES20.GlBindTexture(GLES20.GlTexture2d, mTextures[0]);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMinFilter, GLES20.GlLinearMipmapLinear);
InitGlTextureData(context);
InitializeGlObjectData(context);
ShaderUtil.CheckGlError(TAG, "Init end.");
}
private int[] VBOBuffers = new int[2]; //2 buffers for vertices and colors
public void OnSurfaceCreated(IGL10 gl, Javax.Microedition.Khronos.Egl.EGLConfig config)
{
const float edge = 1.0f;
// X, Y, Z,
float[] triangleVerticesData =
{
-1.5f, -0.25f, 0.0f,
0.5f, -0.25f, 0.0f,
0.0f, 0.559016994f, 0.0f
};
FloatBuffer mTriangleVertices = ByteBuffer.AllocateDirect(triangleVerticesData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleVertices.Put(triangleVerticesData).Flip();
// R, G, B, A
float[] triangleColorsData =
{
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f
};
FloatBuffer mTriangleColors = ByteBuffer.AllocateDirect(triangleColorsData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleColors.Put(triangleColorsData).Flip();
//Use VBO
GLES20.GlGenBuffers(2, VBOBuffers, 0); //2 buffers for vertices and colors
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[0]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleVertices.Capacity() * mBytesPerFloat, mTriangleVertices, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[1]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleColors.Capacity() * mBytesPerFloat, mTriangleColors, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
GLES20.GlClearColor(1.0f, 1.0f, 1.0f, 1.0f);
// Position the eye behind the origin.
float eyeX = 0.0f;
float eyeY = 0.0f;
float eyeZ = 4.5f;
// We are looking toward the distance
float lookX = 0.0f;
float lookY = 0.0f;
float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
float upX = 0.0f;
float upY = 1.0f;
float upZ = 0.0f;
// Set the view matrix. This matrix can be said to represent the camera position.
// NOTE: In OpenGL 1, a ModelView matrix is used, which is a combination of a model and
// view matrix. In OpenGL 2, we can keep track of these matrices separately if we choose.
Matrix.SetLookAtM(mViewMatrix, 0, eyeX, eyeY, eyeZ, lookX, lookY, lookZ, upX, upY, upZ);
string vertexShader =
"uniform mat4 u_MVPMatrix; \n" // A constant representing the combined model/view/projection matrix.
+ "attribute vec4 a_Position; \n" // Per-vertex position information we will pass in.
+ "attribute vec4 a_Color; \n" // Per-vertex color information we will pass in.
+ "varying vec4 v_Color; \n" // This will be passed into the fragment shader.
+ "void main() \n" // The entry point for our vertex shader.
+ "{ \n"
+ " v_Color = a_Color; \n" // Pass the color through to the fragment shader. It will be interpolated across the triangle.
+ " gl_Position = u_MVPMatrix \n" // gl_Position is a special variable used to store the final position.
+ " * a_Position; \n" // Multiply the vertex by the matrix to get the final point in normalized screen coordinates.
+ "} \n";
string fragmentShader =
"precision mediump float; \n" // Set the default precision to medium. We don't need as high of a
// precision in the fragment shader.
+ "varying vec4 v_Color; \n" // This is the color from the vertex shader interpolated across the triangle per fragment.
+ "void main() \n" // The entry point for our fragment shader.
+ "{ \n"
+ " gl_FragColor = v_Color; \n" // Pass the color directly through the pipeline.
+ "} \n";
int vertexShaderHandle = GLES20.GlCreateShader(GLES20.GlVertexShader);
if (vertexShaderHandle != 0)
{
// Pass in the shader source.
GLES20.GlShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.GlCompileShader(vertexShaderHandle);
// Get the compilation status.
int[] compileStatus = new int[1];
GLES20.GlGetShaderiv(vertexShaderHandle, GLES20.GlCompileStatus, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0)
{
GLES20.GlDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0)
{
throw new Exception("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.GlCreateShader(GLES20.GlFragmentShader);
if (fragmentShaderHandle != 0)
{
// Pass in the shader source.
GLES20.GlShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.GlCompileShader(fragmentShaderHandle);
// Get the compilation status.
int[] compileStatus = new int[1];
GLES20.GlGetShaderiv(fragmentShaderHandle, GLES20.GlCompileStatus, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0)
{
GLES20.GlDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0)
{
throw new Exception("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.GlCreateProgram();
if (programHandle != 0)
{
// Bind the vertex shader to the program.
GLES20.GlAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.GlAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.GlBindAttribLocation(programHandle, 0, "a_Position");
GLES20.GlBindAttribLocation(programHandle, 1, "a_Color");
// Link the two shaders together into a program.
GLES20.GlLinkProgram(programHandle);
// Get the link status.
int[] linkStatus = new int[1];
GLES20.GlGetProgramiv(programHandle, GLES20.GlLinkStatus, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0)
{
GLES20.GlDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0)
{
throw new Exception("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.GlGetUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = GLES20.GlGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.GlGetAttribLocation(programHandle, "a_Color");
// Tell OpenGL to use this program when rendering.
GLES20.GlUseProgram(programHandle);
}
/**
* Creates and initializes OpenGL resources needed for rendering the model.
*
* @param context Context for loading the shader and below-named model and texture assets.
* @param objAssetName Name of the OBJ file containing the model geometry.
* @param diffuseTextureAssetName Name of the PNG file containing the diffuse texture map.
*/
public void CreateOnGlThread(Context context, string objAssetName, string diffuseTextureAssetName)
{
// Read the texture.
var textureBitmap = BitmapFactory.DecodeStream(context.Assets.Open(diffuseTextureAssetName));
GLES20.GlActiveTexture(GLES20.GlTexture0);
GLES20.GlGenTextures(mTextures.Length, mTextures, 0);
GLES20.GlBindTexture(GLES20.GlTexture2d, mTextures[0]);
GLES20.GlTexParameteri(GLES20.GlTexture2d,
GLES20.GlTextureMinFilter, GLES20.GlLinearMipmapLinear);
GLES20.GlTexParameteri(GLES20.GlTexture2d,
GLES20.GlTextureMagFilter, GLES20.GlLinear);
GLUtils.TexImage2D(GLES20.GlTexture2d, 0, textureBitmap, 0);
GLES20.GlGenerateMipmap(GLES20.GlTexture2d);
GLES20.GlBindTexture(GLES20.GlTexture2d, 0);
textureBitmap.Recycle();
ShaderUtil.CheckGLError(TAG, "Texture loading");
// Read the obj file.
var objInputStream = context.Assets.Open(objAssetName);
var obj = ObjReader.Read(objInputStream);
// Prepare the Obj so that its structure is suitable for
// rendering with OpenGL:
// 1. Triangulate it
// 2. Make sure that texture coordinates are not ambiguous
// 3. Make sure that normals are not ambiguous
// 4. Convert it to single-indexed data
obj = ObjUtils.ConvertToRenderable(obj);
// OpenGL does not use Java arrays. ByteBuffers are used instead to provide data in a format
// that OpenGL understands.
// Obtain the data from the OBJ, as direct buffers:
IntBuffer wideIndices = ObjData.GetFaceVertexIndices(obj, 3);
FloatBuffer vertices = ObjData.GetVertices(obj);
FloatBuffer texCoords = ObjData.GetTexCoords(obj, 2);
FloatBuffer normals = ObjData.GetNormals(obj);
// Convert int indices to shorts for GL ES 2.0 compatibility
ShortBuffer indices = ByteBuffer.AllocateDirect(2 * wideIndices.Limit())
.Order(ByteOrder.NativeOrder()).AsShortBuffer();
while (wideIndices.HasRemaining)
{
indices.Put((short)wideIndices.Get());
}
indices.Rewind();
var buffers = new int[2];
GLES20.GlGenBuffers(2, buffers, 0);
mVertexBufferId = buffers[0];
mIndexBufferId = buffers[1];
// Load vertex buffer
mVerticesBaseAddress = 0;
mTexCoordsBaseAddress = mVerticesBaseAddress + 4 * vertices.Limit();
mNormalsBaseAddress = mTexCoordsBaseAddress + 4 * texCoords.Limit();
int totalBytes = mNormalsBaseAddress + 4 * normals.Limit();
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVertexBufferId);
GLES20.GlBufferData(GLES20.GlArrayBuffer, totalBytes, null, GLES20.GlStaticDraw);
GLES20.GlBufferSubData(
GLES20.GlArrayBuffer, mVerticesBaseAddress, 4 * vertices.Limit(), vertices);
GLES20.GlBufferSubData(
GLES20.GlArrayBuffer, mTexCoordsBaseAddress, 4 * texCoords.Limit(), texCoords);
GLES20.GlBufferSubData(
GLES20.GlArrayBuffer, mNormalsBaseAddress, 4 * normals.Limit(), normals);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
// Load index buffer
GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, mIndexBufferId);
mIndexCount = indices.Limit();
GLES20.GlBufferData(
GLES20.GlElementArrayBuffer, 2 * mIndexCount, indices, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, 0);
ShaderUtil.CheckGLError(TAG, "OBJ buffer load");
int vertexShader = ShaderUtil.LoadGLShader(TAG, context,
GLES20.GlVertexShader, Resource.Raw.object_vertex);
int fragmentShader = ShaderUtil.LoadGLShader(TAG, context,
GLES20.GlFragmentShader, Resource.Raw.object_fragment);
mProgram = GLES20.GlCreateProgram();
GLES20.GlAttachShader(mProgram, vertexShader);
GLES20.GlAttachShader(mProgram, fragmentShader);
GLES20.GlLinkProgram(mProgram);
GLES20.GlUseProgram(mProgram);
ShaderUtil.CheckGLError(TAG, "Program creation");
mModelViewUniform = GLES20.GlGetUniformLocation(mProgram, "u_ModelView");
mModelViewProjectionUniform =
GLES20.GlGetUniformLocation(mProgram, "u_ModelViewProjection");
mPositionAttribute = GLES20.GlGetAttribLocation(mProgram, "a_Position");
mNormalAttribute = GLES20.GlGetAttribLocation(mProgram, "a_Normal");
mTexCoordAttribute = GLES20.GlGetAttribLocation(mProgram, "a_TexCoord");
mTextureUniform = GLES20.GlGetUniformLocation(mProgram, "u_Texture");
mLightingParametersUniform = GLES20.GlGetUniformLocation(mProgram, "u_LightingParameters");
mMaterialParametersUniform = GLES20.GlGetUniformLocation(mProgram, "u_MaterialParameters");
ShaderUtil.CheckGLError(TAG, "Program parameters");
Android.Opengl.Matrix.SetIdentityM(mModelMatrix, 0);
}
public void CreateOnGlThread(Context context, string objAssetName, string diffuseTextureAssetName)
{
// Read the texture.
var textureBitmap = BitmapFactory.DecodeStream(context.Assets.Open(diffuseTextureAssetName));
GLES20.GlActiveTexture(GLES20.GlTexture0);
GLES20.GlGenTextures(mTextures.Length, mTextures, 0);
GLES20.GlBindTexture(GLES20.GlTexture2d, mTextures[0]);
GLES20.GlTexParameteri(GLES20.GlTexture2d,
GLES20.GlTextureMinFilter, GLES20.GlLinearMipmapLinear);
GLES20.GlTexParameteri(GLES20.GlTexture2d,
GLES20.GlTextureMagFilter, GLES20.GlLinear);
GLUtils.TexImage2D(GLES20.GlTexture2d, 0, textureBitmap, 0);
GLES20.GlGenerateMipmap(GLES20.GlTexture2d);
GLES20.GlBindTexture(GLES20.GlTexture2d, 0);
textureBitmap.Recycle();
ShaderUtil.CheckGLError(TAG, "Texture loading");
// Read the obj file.
var objInputStream = context.Assets.Open(objAssetName);
var obj = JavaGl.Obj.ObjReader.Read(objInputStream);
obj = JavaGl.Obj.ObjUtils.ConvertToRenderable(obj);
IntBuffer wideIndices = JavaGl.Obj.ObjData.GetFaceVertexIndices(obj, 3);
FloatBuffer vertices = JavaGl.Obj.ObjData.GetVertices(obj);
FloatBuffer texCoords = JavaGl.Obj.ObjData.GetTexCoords(obj, 2);
FloatBuffer normals = JavaGl.Obj.ObjData.GetNormals(obj);
ShortBuffer indices = ByteBuffer.AllocateDirect(2 * wideIndices.Limit())
.Order(ByteOrder.NativeOrder()).AsShortBuffer();
while (wideIndices.HasRemaining)
{
indices.Put((short)wideIndices.Get());
}
indices.Rewind();
var buffers = new int[2];
GLES20.GlGenBuffers(2, buffers, 0);
mVertexBufferId = buffers[0];
mIndexBufferId = buffers[1];
mVerticesBaseAddress = 0;
mTexCoordsBaseAddress = mVerticesBaseAddress + 4 * vertices.Limit();
mNormalsBaseAddress = mTexCoordsBaseAddress + 4 * texCoords.Limit();
int totalBytes = mNormalsBaseAddress + 4 * normals.Limit();
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, mVertexBufferId);
GLES20.GlBufferData(GLES20.GlArrayBuffer, totalBytes, null, GLES20.GlStaticDraw);
GLES20.GlBufferSubData(
GLES20.GlArrayBuffer, mVerticesBaseAddress, 4 * vertices.Limit(), vertices);
GLES20.GlBufferSubData(
GLES20.GlArrayBuffer, mTexCoordsBaseAddress, 4 * texCoords.Limit(), texCoords);
GLES20.GlBufferSubData(
GLES20.GlArrayBuffer, mNormalsBaseAddress, 4 * normals.Limit(), normals);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, mIndexBufferId);
mIndexCount = indices.Limit();
GLES20.GlBufferData(
GLES20.GlElementArrayBuffer, 2 * mIndexCount, indices, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlElementArrayBuffer, 0);
ShaderUtil.CheckGLError(TAG, "OBJ buffer load");
int vertexShader = ShaderUtil.LoadGLShader(TAG, context,
GLES20.GlVertexShader, Resource.Raw.object_vertex);
int fragmentShader = ShaderUtil.LoadGLShader(TAG, context,
GLES20.GlFragmentShader, Resource.Raw.object_fragment);
mProgram = GLES20.GlCreateProgram();
GLES20.GlAttachShader(mProgram, vertexShader);
GLES20.GlAttachShader(mProgram, fragmentShader);
GLES20.GlLinkProgram(mProgram);
GLES20.GlUseProgram(mProgram);
ShaderUtil.CheckGLError(TAG, "Program creation");
mModelViewUniform = GLES20.GlGetUniformLocation(mProgram, "u_ModelView");
mModelViewProjectionUniform =
GLES20.GlGetUniformLocation(mProgram, "u_ModelViewProjection");
mPositionAttribute = GLES20.GlGetAttribLocation(mProgram, "a_Position");
mNormalAttribute = GLES20.GlGetAttribLocation(mProgram, "a_Normal");
mTexCoordAttribute = GLES20.GlGetAttribLocation(mProgram, "a_TexCoord");
mTextureUniform = GLES20.GlGetUniformLocation(mProgram, "u_Texture");
mLightingParametersUniform = GLES20.GlGetUniformLocation(mProgram, "u_LightingParameters");
mMaterialParametersUniform = GLES20.GlGetUniformLocation(mProgram, "u_MaterialParameters");
ShaderUtil.CheckGLError(TAG, "Program parameters");
Android.Opengl.Matrix.SetIdentityM(mModelMatrix, 0);
}
public void OnSurfaceCreated(IGL10 gl, Javax.Microedition.Khronos.Egl.EGLConfig config)
{
const float coord = 1.0f;
// Cube coords
// X, Y, Z = 1 vertex * 3 = 1 face * 12 = 1 cube
float[] triangleVerticesData =
{
-coord, -coord, -coord,
-coord, -coord, coord,
-coord, coord, coord,
coord, coord, -coord,
-coord, -coord, -coord,
-coord, coord, -coord,
coord, -coord, coord,
-coord, -coord, -coord,
coord, -coord, -coord,
coord, coord, -coord,
coord, -coord, -coord,
-coord, -coord, -coord,
-coord, -coord, -coord,
-coord, coord, coord,
-coord, coord, -coord,
coord, -coord, coord,
-coord, -coord, coord,
-coord, -coord, -coord,
-coord, coord, coord,
-coord, -coord, coord,
coord, -coord, coord,
coord, coord, coord,
coord, -coord, -coord,
coord, coord, -coord,
coord, -coord, -coord,
coord, coord, coord,
coord, -coord, coord,
coord, coord, coord,
coord, coord, -coord,
-coord, coord, -coord,
coord, coord, coord,
-coord, coord, -coord,
-coord, coord, coord,
coord, coord, coord,
-coord, coord, coord,
coord, -coord, coord
};
FloatBuffer mTriangleVertices = ByteBuffer.AllocateDirect(triangleVerticesData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleVertices.Put(triangleVerticesData).Flip();
// Cube colors
// R, G, B, A
float[] triangleColorsData =
{
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f
};
FloatBuffer mTriangleColors = ByteBuffer.AllocateDirect(triangleColorsData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleColors.Put(triangleColorsData).Flip();
//Cube texture UV Map
float[] triangleTextureUVMapData =
{
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f
};
FloatBuffer mTriangleTextureUVMap = ByteBuffer.AllocateDirect(triangleTextureUVMapData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleTextureUVMap.Put(triangleTextureUVMapData).Flip();
//triagles normals
//This normal array is not right, it is spacialy DO FOR demonstrate how normals work with faces when light is calculated at shader program
float[] triangleNormalData =
{
// Front face
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
// Right face
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
// Back face
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
// Left face
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
// Top face
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
// Bottom face
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f
};
FloatBuffer mTriangleNormal = ByteBuffer.AllocateDirect(triangleNormalData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleNormal.Put(triangleNormalData).Flip();
//Data buffers to VBO
GLES20.GlGenBuffers(4, VBOBuffers, 0); //2 buffers for vertices, texture and colors
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[0]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleVertices.Capacity() * mBytesPerFloat, mTriangleVertices, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[1]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleColors.Capacity() * mBytesPerFloat, mTriangleColors, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[2]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleTextureUVMap.Capacity() * mBytesPerFloat, mTriangleTextureUVMap, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[3]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleNormal.Capacity() * mBytesPerFloat, mTriangleNormal, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
//Load and setup texture
GLES20.GlGenTextures(1, textureHandle, 0); //init 1 texture storage handle
if (textureHandle[0] != 0)
{
//Android.Graphics cose class Matrix exists at both Android.Graphics and Android.OpenGL and this is only sample of using
Android.Graphics.BitmapFactory.Options options = new Android.Graphics.BitmapFactory.Options();
options.InScaled = false; // No pre-scaling
Android.Graphics.Bitmap bitmap = Android.Graphics.BitmapFactory.DecodeResource(context.Resources, Resource.Drawable.texture1, options);
GLES20.GlBindTexture(GLES20.GlTexture2d, textureHandle[0]);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMinFilter, GLES20.GlNearest);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMagFilter, GLES20.GlNearest);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapS, GLES20.GlClampToEdge);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapT, GLES20.GlClampToEdge);
GLUtils.TexImage2D(GLES20.GlTexture2d, 0, bitmap, 0);
bitmap.Recycle();
}
//Ask android to run RAM garbage cleaner
System.GC.Collect();
//Setup OpenGL ES
GLES20.GlClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// GLES20.GlEnable(GLES20.GlDepthTest); //uncoment if needs enabled dpeth test
GLES20.GlEnable(2884); // GlCullFace == 2884 see OpenGL documentation to this constant value
GLES20.GlCullFace(GLES20.GlBack);
// Position the eye behind the origin.
float eyeX = 0.0f;
float eyeY = 0.0f;
float eyeZ = 4.5f;
// We are looking toward the distance
float lookX = 0.0f;
float lookY = 0.0f;
float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
float upX = 0.0f;
float upY = coord;
float upZ = 0.0f;
// Set the view matrix. This matrix can be said to represent the camera position.
// NOTE: In OpenGL 1, a ModelView matrix is used, which is a combination of a model and
// view matrix. In OpenGL 2, we can keep track of these matrices separately if we choose.
Matrix.SetLookAtM(mViewMatrix, 0, eyeX, eyeY, eyeZ, lookX, lookY, lookZ, upX, upY, upZ);
//all "attribute" variables is "triagles" VBO (arrays) items representation
//a_Possition[0] <=> a_Color[0] <=> a_TextureCoord[0] <=> a_Normal[0]
//a_Possition[1] <=> a_Color[1] <=> a_TextureCoord[1] <=> a_Normal[1]
//...
//a_Possition[n] <=> a_Color[n] <=> a_TextureCoord[n] <=> a_Normal[n] -- where "n" is object buffers length
//-> HOW MANY faces in your object (model) in VBO -> how many times the vertex shader will be called by OpenGL
string vertexShader =
"uniform mat4 u_MVPMatrix; \n" // A constant representing the combined model/view/projection matrix.
+ "uniform vec3 u_LightPos; \n" // A constant representing the light source position
+ "attribute vec4 a_Position; \n" // Per-vertex position information we will pass in. (it means vec4[x,y,z,w] but we put only x,y,z at this sample
+ "attribute vec4 a_Color; \n" // Per-vertex color information we will pass in.
+ "varying vec4 v_Color; \n" // This will be passed into the fragment shader.
+ "attribute vec2 a_TextureCoord; \n" // Per-vertex texture UVMap information we will pass in.
+ "varying vec2 v_TextureCoord; \n" // This will be passed into the fragment shader.
+ "attribute vec3 a_Normal; \n" // Per-vertex normals information we will pass in.
+ "void main() \n" // The entry point for our vertex shader.
+ "{ \n"
//light calculation section for fragment shader
+ " vec3 modelViewVertex = vec3(u_MVPMatrix * a_Position);\n"
+ " vec3 modelViewNormal = vec3(u_MVPMatrix * vec4(a_Normal, 0.0));\n"
+ " float distance = length(u_LightPos - modelViewVertex);\n"
+ " vec3 lightVector = normalize(u_LightPos - modelViewVertex);\n"
+ " float diffuse = max(dot(modelViewNormal, lightVector), 0.1);\n"
+ " diffuse = diffuse * (1.0 / (1.0 + (0.25 * distance * distance)));\n"
+ " v_Color = a_Color * vec4(diffuse);\n" //Pass the color with light aspect to fragment shader
+ " v_TextureCoord = a_TextureCoord; \n" // Pass the texture coordinate through to the fragment shader. It will be interpolated across the triangle.
+ " gl_Position = u_MVPMatrix \n" // gl_Position is a special variable used to store the final position.
+ " * a_Position; \n" // Multiply the vertex by the matrix to get the final point in normalized screen coordinates.
+ "} \n";
string fragmentShader =
"precision mediump float; \n" // Set the default precision to medium. We don't need as high of a
// precision in the fragment shader.
+ "varying vec4 v_Color; \n" // This is the color from the vertex shader interpolated across the triangle per fragment.
+ "varying vec2 v_TextureCoord; \n" // This is the texture coordinate from the vertex shader interpolated across the triangle per fragment.
+ "uniform sampler2D u_Texture; \n" // This is the texture image handler
+ "void main() \n" // The entry point for our fragment shader.
+ "{ \n"
+ " gl_FragColor = texture2D(u_Texture, v_TextureCoord) * v_Color; \n" // Pass the color directly through the pipeline.
+ "} \n";
int vertexShaderHandle = GLES20.GlCreateShader(GLES20.GlVertexShader);
if (vertexShaderHandle != 0)
{
// Pass in the shader source.
GLES20.GlShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.GlCompileShader(vertexShaderHandle);
// Get the compilation status.
int[] compileStatus = new int[1];
GLES20.GlGetShaderiv(vertexShaderHandle, GLES20.GlCompileStatus, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0)
{
GLES20.GlDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0)
{
throw new Exception("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.GlCreateShader(GLES20.GlFragmentShader);
if (fragmentShaderHandle != 0)
{
// Pass in the shader source.
GLES20.GlShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.GlCompileShader(fragmentShaderHandle);
// Get the compilation status.
int[] compileStatus = new int[1];
GLES20.GlGetShaderiv(fragmentShaderHandle, GLES20.GlCompileStatus, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0)
{
GLES20.GlDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0)
{
throw new Exception("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.GlCreateProgram();
if (programHandle != 0)
{
// Bind the vertex shader to the program.
GLES20.GlAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.GlAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.GlBindAttribLocation(programHandle, 0, "a_Position");
GLES20.GlBindAttribLocation(programHandle, 1, "a_Color");
GLES20.GlBindAttribLocation(programHandle, 2, "a_TextureCoord");
GLES20.GlBindAttribLocation(programHandle, 3, "a_Normal");
// Link the two shaders together into a program.
GLES20.GlLinkProgram(programHandle);
// Get the link status.
int[] linkStatus = new int[1];
GLES20.GlGetProgramiv(programHandle, GLES20.GlLinkStatus, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0)
{
GLES20.GlDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0)
{
throw new Exception("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.GlGetUniformLocation(programHandle, "u_MVPMatrix");
mLightPos = GLES20.GlGetUniformLocation(programHandle, "u_LightPos");
mPositionHandle = GLES20.GlGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.GlGetAttribLocation(programHandle, "a_Color");
mTextureCoordHandle = GLES20.GlGetAttribLocation(programHandle, "a_TextureCoord");
mNormalHandle = GLES20.GlGetAttribLocation(programHandle, "a_Normal");
mTextureHandle = GLES20.GlGetUniformLocation(programHandle, "u_Texture");
// Tell OpenGL to use this program when rendering.
GLES20.GlUseProgram(programHandle);
}
public Framebuffer()
{
int[] buffers = new int[1];
GLES20.GlGenBuffers(1, buffers, 0);
id = buffers[0];
}
public void OnSurfaceCreated(IGL10 gl, Javax.Microedition.Khronos.Egl.EGLConfig config)
{
const float coord = 1.0f;
ObjParser model3D = new ObjParser();
List <byte[]> test1 = model3D.ParsedObject(context, "buggy");
float[] vertexArray = new float[test1[0].Length / 4];
System.Buffer.BlockCopy(test1[0], 0, vertexArray, 0, (int)test1[0].Length);
modelVerticesData = vertexArray;
FloatBuffer mTriangleVertices = ByteBuffer.AllocateDirect(modelVerticesData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleVertices.Put(modelVerticesData).Flip();
// Cube colors
// R, G, B, A
float[] modelColorsData =
{
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f,
1.0f, 0.0f, 0.0f, 0.5f,
0.0f, 0.5f, 1.0f, 1.0f,
0.0f, 1.0f, 0.0f, 1.0f
};
FloatBuffer mTriangleColors = ByteBuffer.AllocateDirect(modelColorsData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleColors.Put(modelColorsData).Flip();
float[] textureUVMapArray = new float[test1[1].Length / 4];
System.Buffer.BlockCopy(test1[1], 0, textureUVMapArray, 0, (int)test1[1].Length);
modelTextureUVMapData = textureUVMapArray;
FloatBuffer mTriangleTextureUVMap = ByteBuffer.AllocateDirect(modelTextureUVMapData.Length * mBytesPerFloat).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
mTriangleTextureUVMap.Put(modelTextureUVMapData).Flip();
//Data buffers to VBO
GLES20.GlGenBuffers(3, VBOBuffers, 0); //2 buffers for vertices, texture and colors
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[0]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleVertices.Capacity() * mBytesPerFloat, mTriangleVertices, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[1]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleColors.Capacity() * mBytesPerFloat, mTriangleColors, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, VBOBuffers[2]);
GLES20.GlBufferData(GLES20.GlArrayBuffer, mTriangleTextureUVMap.Capacity() * mBytesPerFloat, mTriangleTextureUVMap, GLES20.GlStaticDraw);
GLES20.GlBindBuffer(GLES20.GlArrayBuffer, 0);
//Load and setup texture
GLES20.GlGenTextures(1, textureHandle, 0); //init 1 texture storage handle
if (textureHandle[0] != 0)
{
//Android.Graphics cose class Matrix exists at both Android.Graphics and Android.OpenGL and this is only sample of using
Android.Graphics.BitmapFactory.Options options = new Android.Graphics.BitmapFactory.Options();
options.InScaled = false; // No pre-scaling
Android.Graphics.Bitmap bitmap = Android.Graphics.BitmapFactory.DecodeResource(context.Resources, Resource.Drawable.iam, options);
GLES20.GlBindTexture(GLES20.GlTexture2d, textureHandle[0]);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMinFilter, GLES20.GlNearest);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureMagFilter, GLES20.GlNearest);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapS, GLES20.GlClampToEdge);
GLES20.GlTexParameteri(GLES20.GlTexture2d, GLES20.GlTextureWrapT, GLES20.GlClampToEdge);
GLUtils.TexImage2D(GLES20.GlTexture2d, 0, bitmap, 0);
bitmap.Recycle();
}
//Ask android to run RAM garbage cleaner
System.GC.Collect();
//Setup OpenGL ES
GLES20.GlClearColor(coord, coord, coord, coord);
// GLES20.GlEnable(GLES20.GlDepthTest); //uncoment if needs enabled dpeth test
GLES20.GlEnable(2884); // GlCullFace == 2884 see OpenGL documentation to this constant value
GLES20.GlCullFace(GLES20.GlBack);
// Position the eye behind the origin.
float eyeX = 0.0f;
float eyeY = 0.0f;
float eyeZ = 4.5f;
// We are looking toward the distance
float lookX = 0.0f;
float lookY = 0.0f;
float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
float upX = 0.0f;
float upY = coord;
float upZ = 0.0f;
// Set the view matrix. This matrix can be said to represent the camera position.
// NOTE: In OpenGL 1, a ModelView matrix is used, which is a combination of a model and
// view matrix. In OpenGL 2, we can keep track of these matrices separately if we choose.
Matrix.SetLookAtM(mViewMatrix, 0, eyeX, eyeY, eyeZ, lookX, lookY, lookZ, upX, upY, upZ);
string vertexShader =
"uniform mat4 u_MVPMatrix; \n" // A constant representing the combined model/view/projection matrix.
+ "attribute vec4 a_Position; \n" // Per-vertex position information we will pass in.
+ "attribute vec4 a_Color; \n" // Per-vertex color information we will pass in.
+ "varying vec4 v_Color; \n" // This will be passed into the fragment shader.
+ "attribute vec2 a_TextureCoord; \n"
+ "varying vec2 v_TextureCoord; \n"
+ "void main() \n" // The entry point for our vertex shader.
+ "{ \n"
+ " v_TextureCoord = a_TextureCoord; \n" // Pass the color through to the fragment shader. It will be interpolated across the triangle.
+ " v_Color = a_Color; \n" // Pass the color through to the fragment shader. It will be interpolated across the triangle.
+ " gl_Position = u_MVPMatrix \n" // gl_Position is a special variable used to store the final position.
+ " * a_Position; \n" // Multiply the vertex by the matrix to get the final point in normalized screen coordinates.
+ "} \n";
string fragmentShader =
"precision mediump float; \n" // Set the default precision to medium. We don't need as high of a
// precision in the fragment shader.
+ "varying vec4 v_Color; \n" // This is the color from the vertex shader interpolated across the triangle per fragment.
+ "varying vec2 v_TextureCoord; \n"
+ "uniform sampler2D u_Texture; \n"
+ "void main() \n" // The entry point for our fragment shader.
+ "{ \n"
+ " gl_FragColor = texture2D(u_Texture, v_TextureCoord); \n" // Pass the color directly through the pipeline.
+ "} \n";
vertexShader = string.Empty;
fragmentShader = string.Empty;
int resourceId = context.Resources.GetIdentifier("vertexshadervladimir1", "raw", context.PackageName);
Stream fileStream = context.Resources.OpenRawResource(resourceId);
StreamReader streamReader = new StreamReader(fileStream);
string line = string.Empty;
while ((line = streamReader.ReadLine()) != null)
{
vertexShader += line + "\n";
}
resourceId = context.Resources.GetIdentifier("fragmentshadervladimir1", "raw", context.PackageName);
fileStream = context.Resources.OpenRawResource(resourceId);
streamReader = new StreamReader(fileStream);
while ((line = streamReader.ReadLine()) != null)
{
fragmentShader += line + "\n";
}
int vertexShaderHandle = GLES20.GlCreateShader(GLES20.GlVertexShader);
if (vertexShaderHandle != 0)
{
// Pass in the shader source.
GLES20.GlShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.GlCompileShader(vertexShaderHandle);
// Get the compilation status.
int[] compileStatus = new int[1];
GLES20.GlGetShaderiv(vertexShaderHandle, GLES20.GlCompileStatus, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0)
{
GLES20.GlDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0)
{
throw new Exception("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.GlCreateShader(GLES20.GlFragmentShader);
if (fragmentShaderHandle != 0)
{
// Pass in the shader source.
GLES20.GlShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.GlCompileShader(fragmentShaderHandle);
// Get the compilation status.
int[] compileStatus = new int[1];
GLES20.GlGetShaderiv(fragmentShaderHandle, GLES20.GlCompileStatus, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0)
{
GLES20.GlDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0)
{
throw new Exception("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.GlCreateProgram();
if (programHandle != 0)
{
// Bind the vertex shader to the program.
GLES20.GlAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.GlAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.GlBindAttribLocation(programHandle, 0, "a_Position");
GLES20.GlBindAttribLocation(programHandle, 1, "a_Color");
GLES20.GlBindAttribLocation(programHandle, 2, "a_TextureCoord");
// Link the two shaders together into a program.
GLES20.GlLinkProgram(programHandle);
// Get the link status.
int[] linkStatus = new int[1];
GLES20.GlGetProgramiv(programHandle, GLES20.GlLinkStatus, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0)
{
GLES20.GlDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0)
{
throw new Exception("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.GlGetUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = GLES20.GlGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.GlGetAttribLocation(programHandle, "a_Color");
mTextureCoordHandle = GLES20.GlGetAttribLocation(programHandle, "a_TextureCoord");
mTextureHandle = GLES20.GlGetUniformLocation(programHandle, "u_Texture");
// Tell OpenGL to use this program when rendering.
GLES20.GlUseProgram(programHandle);
}
public DistortionMesh(EyeParams eye, Distortion distortion, float screenWidthM, float screenHeightM, float xEyeOffsetMScreen, float yEyeOffsetMScreen, float textureWidthM, float textureHeightM, float xEyeOffsetMTexture, float yEyeOffsetMTexture, float viewportXMTexture, float viewportYMTexture, float viewportWidthMTexture, float viewportHeightMTexture)
{
float mPerUScreen = screenWidthM;
float mPerVScreen = screenHeightM;
float mPerUTexture = textureWidthM;
float mPerVTexture = textureHeightM;
float[] vertexData = new float[8000];
int vertexOffset = 0;
for (int row = 0; row < 40; row++)
{
for (int col = 0; col < 40; col++)
{
float uTexture = col / 39.0F * (viewportWidthMTexture / textureWidthM) + viewportXMTexture / textureWidthM;
float vTexture = row / 39.0F * (viewportHeightMTexture / textureHeightM) + viewportYMTexture / textureHeightM;
float xTexture = uTexture * mPerUTexture;
float yTexture = vTexture * mPerVTexture;
float xTextureEye = xTexture - xEyeOffsetMTexture;
float yTextureEye = yTexture - yEyeOffsetMTexture;
float rTexture = (float)Math.Sqrt(xTextureEye * xTextureEye + yTextureEye * yTextureEye);
float textureToScreen = rTexture > 0.0F ? distortion.distortInverse(rTexture) / rTexture : 1.0F;
float xScreen = xTextureEye * textureToScreen + xEyeOffsetMScreen;
float yScreen = yTextureEye * textureToScreen + yEyeOffsetMScreen;
float uScreen = xScreen / mPerUScreen;
float vScreen = yScreen / mPerVScreen;
float vignetteSizeMTexture = 0.002F / textureToScreen;
float dxTexture = xTexture - DistortionRenderer.clamp(xTexture, viewportXMTexture + vignetteSizeMTexture, viewportXMTexture + viewportWidthMTexture - vignetteSizeMTexture);
float dyTexture = yTexture - DistortionRenderer.clamp(yTexture, viewportYMTexture + vignetteSizeMTexture, viewportYMTexture + viewportHeightMTexture - vignetteSizeMTexture);
float drTexture = (float)Math.Sqrt(dxTexture * dxTexture + dyTexture * dyTexture);
float vignette = 1.0F - DistortionRenderer.clamp(drTexture / vignetteSizeMTexture, 0.0F, 1.0F);
vertexData[(vertexOffset + 0)] = (2.0F * uScreen - 1.0F);
vertexData[(vertexOffset + 1)] = (2.0F * vScreen - 1.0F);
vertexData[(vertexOffset + 2)] = vignette;
vertexData[(vertexOffset + 3)] = uTexture;
vertexData[(vertexOffset + 4)] = vTexture;
vertexOffset += 5;
}
}
nIndices = 3158;
int[] indexData = new int[nIndices];
int indexOffset = 0;
vertexOffset = 0;
for (int row = 0; row < 39; row++)
{
if (row > 0)
{
indexData[indexOffset] = indexData[(indexOffset - 1)];
indexOffset++;
}
for (int col = 0; col < 40; col++)
{
if (col > 0)
{
if (row % 2 == 0)
{
vertexOffset++;
}
else
{
vertexOffset--;
}
}
indexData[(indexOffset++)] = vertexOffset;
indexData[(indexOffset++)] = (vertexOffset + 40);
}
vertexOffset += 40;
}
FloatBuffer vertexBuffer = ByteBuffer.AllocateDirect(vertexData.Length * 4).Order(ByteOrder.NativeOrder()).AsFloatBuffer();
vertexBuffer.Put(vertexData).Position(0);
IntBuffer indexBuffer = ByteBuffer.AllocateDirect(indexData.Length * 4).Order(ByteOrder.NativeOrder()).AsIntBuffer();
indexBuffer.Put(indexData).Position(0);
int[] bufferIds = new int[2];
GLES20.GlGenBuffers(2, bufferIds, 0);
mArrayBufferId = bufferIds[0];
mElementBufferId = bufferIds[1];
GLES20.GlBindBuffer(34962, mArrayBufferId);
GLES20.GlBufferData(34962, vertexData.Length * 4, vertexBuffer, 35044);
GLES20.GlBindBuffer(34963, mElementBufferId);
GLES20.GlBufferData(34963, indexData.Length * 4, indexBuffer, 35044);
GLES20.GlBindBuffer(34962, 0);
GLES20.GlBindBuffer(34963, 0);
}