public ApplicationSurface(RenderingContextView v, Button button_set_min_filter, Button button_set_mag_filter, Activity OwnerActivity)
{
v.onsurface +=
gl =>
{
//var __gl = (ScriptCoreLib.Android.__WebGLRenderingContext)(object)gl;
#region fields
/**
* Store the model matrix. This matrix is used to move models from object space (where each model can be thought
* of being located at the center of the universe) to world space.
*/
float[] mModelMatrix = new float[16];
/**
* Store the view matrix. This can be thought of as our camera. This matrix transforms world space to eye space;
* it positions things relative to our eye.
*/
float[] mViewMatrix = new float[16];
/** Store the projection matrix. This is used to project the scene onto a 2D viewport. */
float[] mProjectionMatrix = new float[16];
/** Allocate storage for the final combined matrix. This will be passed into the shader program. */
float[] mMVPMatrix = new float[16];
/** Store the accumulated rotation. */
float[] mAccumulatedRotation = new float[16];
/** Store the current rotation. */
float[] mCurrentRotation = new float[16];
/** A temporary matrix. */
float[] mTemporaryMatrix = new float[16];
/**
* Stores a copy of the model matrix specifically for the light position.
*/
float[] mLightModelMatrix = new float[16];
/** Store our model data in a float buffer. */
FloatBuffer mCubePositions;
FloatBuffer mCubeNormals;
FloatBuffer mCubeTextureCoordinates;
FloatBuffer mCubeTextureCoordinatesForPlane;
/** This will be used to pass in the transformation matrix. */
ScriptCoreLib.JavaScript.WebGL.WebGLUniformLocation mMVPMatrixHandle;
/** This will be used to pass in the modelview matrix. */
ScriptCoreLib.JavaScript.WebGL.WebGLUniformLocation mMVMatrixHandle;
/** This will be used to pass in the light position. */
ScriptCoreLib.JavaScript.WebGL.WebGLUniformLocation mLightPosHandle;
/** This will be used to pass in the texture. */
ScriptCoreLib.JavaScript.WebGL.WebGLUniformLocation mTextureUniformHandle;
/** This will be used to pass in model position information. */
int mPositionHandle;
/** This will be used to pass in model normal information. */
int mNormalHandle;
/** This will be used to pass in model texture coordinate information. */
int mTextureCoordinateHandle;
/** How many bytes per float. */
int mBytesPerFloat = 4;
/** Size of the position data in elements. */
int mPositionDataSize = 3;
/** Size of the normal data in elements. */
int mNormalDataSize = 3;
/** Size of the texture coordinate data in elements. */
int mTextureCoordinateDataSize = 2;
/** Used to hold a light centered on the origin in model space. We need a 4th coordinate so we can get translations to work when
* we multiply this by our transformation matrices. */
float[] mLightPosInModelSpace = new float[] { 0.0f, 0.0f, 0.0f, 1.0f };
/** Used to hold the current position of the light in world space (after transformation via model matrix). */
float[] mLightPosInWorldSpace = new float[4];
/** Used to hold the transformed position of the light in eye space (after transformation via modelview matrix) */
float[] mLightPosInEyeSpace = new float[4];
/** This is a handle to our cube shading program. */
ScriptCoreLib.JavaScript.WebGL.WebGLProgram mProgramHandle;
/** This is a handle to our light point program. */
ScriptCoreLib.JavaScript.WebGL.WebGLProgram mPointProgramHandle;
/** These are handles to our texture data. */
ScriptCoreLib.JavaScript.WebGL.WebGLTexture mBrickDataHandle;
ScriptCoreLib.JavaScript.WebGL.WebGLTexture mGrassDataHandle;
#endregion
#region ontouchmove
// These still work without volatile, but refreshes are not guaranteed to happen.
/* volatile */
float mDeltaX = 0;
/* volatile */
float mDeltaY = 0;
v.ontouchmove +=
(x, y) =>
{
mDeltaX += x;
mDeltaY += y;
};
#endregion
#region Define points for a cube.
// X, Y, Z
float[] cubePositionData =
{
// In OpenGL counter-clockwise winding is default. This means that when we look at a triangle,
// if the points are counter-clockwise we are looking at the "front". If not we are looking at
// the back. OpenGL has an optimization where all back-facing triangles are culled, since they
// usually represent the backside of an object and aren't visible anyways.
// Front 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,
1.0f, -1.0f, 1.0f,
1.0f, 1.0f, 1.0f,
// Right 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,
1.0f, -1.0f, -1.0f,
1.0f, 1.0f, -1.0f,
// Back 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,
-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,
-1.0f, -1.0f, 1.0f,
-1.0f, 1.0f, 1.0f,
// Top 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,
1.0f, 1.0f, 1.0f,
1.0f, 1.0f, -1.0f,
// Bottom 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,
-1.0f, -1.0f, 1.0f,
-1.0f, -1.0f, -1.0f,
};
// X, Y, Z
// The normal is used in light calculations and is a vector which points
// orthogonal to the plane of the surface. For a cube model, the normals
// should be orthogonal to the points of each face.
float[] cubeNormalData =
{
// Front 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,
// 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
};
// S, T (or X, Y)
// Texture coordinate data.
// Because images have a Y axis pointing downward (values increase as you move down the image) while
// OpenGL has a Y axis pointing upward, we adjust for that here by flipping the Y axis.
// What's more is that the texture coordinates are the same for every face.
float[] cubeTextureCoordinateData =
{
// Front face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Right face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Back face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Left face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Top face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Bottom face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f
};
// S, T (or X, Y)
// Texture coordinate data.
// Because images have a Y axis pointing downward (values increase as you move down the image) while
// OpenGL has a Y axis pointing upward, we adjust for that here by flipping the Y axis.
// What's more is that the texture coordinates are the same for every face.
float[] cubeTextureCoordinateDataForPlane =
{
// Front face
0.0f, 0.0f,
0.0f, 25.0f,
25.0f, 0.0f,
0.0f, 25.0f,
25.0f, 25.0f,
25.0f, 0.0f,
// Right face
0.0f, 0.0f,
0.0f, 25.0f,
25.0f, 0.0f,
0.0f, 25.0f,
25.0f, 25.0f,
25.0f, 0.0f,
// Back face
0.0f, 0.0f,
0.0f, 25.0f,
25.0f, 0.0f,
0.0f, 25.0f,
25.0f, 25.0f,
25.0f, 0.0f,
// Left face
0.0f, 0.0f,
0.0f, 25.0f,
25.0f, 0.0f,
0.0f, 25.0f,
25.0f, 25.0f,
25.0f, 0.0f,
// Top face
0.0f, 0.0f,
0.0f, 25.0f,
25.0f, 0.0f,
0.0f, 25.0f,
25.0f, 25.0f,
25.0f, 0.0f,
// Bottom face
0.0f, 0.0f,
0.0f, 25.0f,
25.0f, 0.0f,
0.0f, 25.0f,
25.0f, 25.0f,
25.0f, 0.0f
};
#endregion
#region Initialize the buffers.
mCubePositions = ByteBuffer.allocateDirect(cubePositionData.Length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubePositions.put(cubePositionData).position(0);
mCubeNormals = ByteBuffer.allocateDirect(cubeNormalData.Length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubeNormals.put(cubeNormalData).position(0);
mCubeTextureCoordinates = ByteBuffer.allocateDirect(cubeTextureCoordinateData.Length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubeTextureCoordinates.put(cubeTextureCoordinateData).position(0);
mCubeTextureCoordinatesForPlane = ByteBuffer.allocateDirect(cubeTextureCoordinateDataForPlane.Length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubeTextureCoordinatesForPlane.put(cubeTextureCoordinateDataForPlane).position(0);
#endregion
// Set the background clear color to black.
gl.clearColor(0.0f, 0.0f, 0.0f, 0.0f);
// Use culling to remove back faces.
gl.enable(gl.CULL_FACE);
// Enable depth testing
gl.enable(gl.DEPTH_TEST);
// Enable texture mapping
gl.enable(gl.TEXTURE_2D);
#region setLookAtM
// Position the eye in front of the origin.
float eyeX = 0.0f;
float eyeY = 0.0f;
float eyeZ = -0.5f;
// 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);
#endregion
#region mProgramHandle
mProgramHandle = gl.createProgram(
new Shaders.per_pixel_tex_and_lightVertexShader(),
new Shaders.per_pixel_tex_and_lightFragmentShader()
);
gl.bindAttribLocation(mProgramHandle, 0, "a_Position");
gl.bindAttribLocation(mProgramHandle, 1, "a_Color");
gl.bindAttribLocation(mProgramHandle, 2, "a_TexCoordinate");
gl.linkProgram(mProgramHandle);
#endregion
// Define a simple shader program for our point.
#region mPointProgramHandle
mPointProgramHandle = gl.createProgram(
new Shaders.pointVertexShader(),
new Shaders.pointFragmentShader()
);
gl.bindAttribLocation(mPointProgramHandle, 0, "a_Position");
gl.linkProgram(mPointProgramHandle);
#endregion
#region loadTexture
Func<android.graphics.Bitmap, ScriptCoreLib.JavaScript.WebGL.WebGLTexture> loadTexture = (bitmap) =>
{
var textureHandle = gl.createTexture();
// Bind to the texture in OpenGL
gl.bindTexture(gl.TEXTURE_2D, textureHandle);
// Set filtering
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, (int)gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, (int)gl.NEAREST);
// Load the bitmap into the bound texture.
GLUtils.texImage2D((int)gl.TEXTURE_2D, 0, bitmap, 0);
// Recycle the bitmap, since its data has been loaded into OpenGL.
bitmap.recycle();
return textureHandle;
};
#endregion
#region openFileFromAssets
Func<string, InputStream> openFileFromAssets = (string spath) =>
{
InputStream value = null;
try
{
value = OwnerActivity.getResources().getAssets().open(spath);
}
catch
{
}
return value;
};
#endregion
// cant we use knownAssets yet?
var stone_wall_public_domain = android.graphics.BitmapFactory.decodeStream(
openFileFromAssets("assets/AndroidOpenGLESLesson6Activity/stone_wall_public_domain.png")
);
var noisy_grass_public_domain = android.graphics.BitmapFactory.decodeStream(
openFileFromAssets("assets/AndroidOpenGLESLesson6Activity/noisy_grass_public_domain.png")
);
// Load the texture
mBrickDataHandle = loadTexture(
stone_wall_public_domain
);
gl.generateMipmap(gl.TEXTURE_2D);
mGrassDataHandle = loadTexture(
noisy_grass_public_domain
);
gl.generateMipmap(gl.TEXTURE_2D);
// Initialize the accumulated rotation matrix
Matrix.setIdentityM(mAccumulatedRotation, 0);
#region onresize
v.onresize +=
(width, height) =>
{
// Set the OpenGL viewport to the same size as the surface.
gl.viewport(0, 0, width, height);
// Create a new perspective projection matrix. The height will stay the same
// while the width will vary as per aspect ratio.
float ratio = (float)width / height;
float left = -ratio;
float right = ratio;
float bottom = -1.0f;
float top = 1.0f;
float near = 1.0f;
float far = 1000.0f;
Matrix.frustumM(mProjectionMatrix, 0, left, right, bottom, top, near, far);
};
#endregion
#region TEXTURE_MIN_FILTER
button_set_min_filter.AtClick(
delegate
{
var builder = new AlertDialog.Builder(OwnerActivity);
builder.setTitle("Set TEXTURE_MIN_FILTER!");
builder.setItems(
new[] {
"NEAREST",
"LINEAR",
"NEAREST_MIPMAP_NEAREST",
"NEAREST_MIPMAP_LINEAR",
"LINEAR_MIPMAP_NEAREST",
"LINEAR_MIPMAP_LINEAR",
},
item =>
{
v.queueEvent(
delegate
{
int filter;
if (item == 0)
{
filter = (int)gl.NEAREST;
}
else if (item == 1)
{
filter = (int)gl.LINEAR;
}
else if (item == 2)
{
filter = (int)gl.NEAREST_MIPMAP_NEAREST;
}
else if (item == 3)
{
filter = (int)gl.NEAREST_MIPMAP_LINEAR;
}
else if (item == 4)
{
filter = (int)gl.LINEAR_MIPMAP_NEAREST;
}
else // if (item == 5)
{
filter = (int)gl.LINEAR_MIPMAP_LINEAR;
}
if (mBrickDataHandle != null)
if (mGrassDataHandle != null)
{
gl.bindTexture(gl.TEXTURE_2D, mBrickDataHandle);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, filter);
gl.bindTexture(gl.TEXTURE_2D, mGrassDataHandle);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, filter);
}
}
);
}
);
var dialog = builder.create();
dialog.setOwnerActivity(OwnerActivity);
dialog.show();
}
);
#endregion
#region TEXTURE_MAG_FILTER
button_set_mag_filter.AtClick(
delegate
{
var builder = new AlertDialog.Builder(OwnerActivity);
builder.setTitle("Set TEXTURE_MAG_FILTER");
builder.setItems(
new[]{
"GL_NEAREST",
"GL_LINEAR"
},
item =>
{
v.queueEvent(
delegate
{
int filter;
if (item == 0)
{
filter = (int)gl.NEAREST;
}
else // if (item == 1)
{
filter = (int)gl.LINEAR;
}
if (mBrickDataHandle != null)
if (mGrassDataHandle != null)
{
gl.bindTexture(gl.TEXTURE_2D, mBrickDataHandle);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, filter);
gl.bindTexture(gl.TEXTURE_2D, mGrassDataHandle);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, filter);
}
}
);
}
);
var dialog = builder.create();
dialog.setOwnerActivity(OwnerActivity);
dialog.show();
}
);
#endregion
#region onframe
v.onframe +=
delegate
{
var sw = Stopwatch.StartNew();
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
// Do a complete rotation every 10 seconds.
long time = SystemClock.uptimeMillis() % 10000L;
long slowTime = SystemClock.uptimeMillis() % 100000L;
float angleInDegrees = (360.0f / 10000.0f) * ((int)time);
float slowAngleInDegrees = (360.0f / 100000.0f) * ((int)slowTime);
var program = mProgramHandle;
// Set our per-vertex lighting program.
gl.useProgram(program);
var uniforms = program.Uniforms(gl);
// Set program handles for cube drawing.
mMVPMatrixHandle = gl.getUniformLocation(program, "u_MVPMatrix");
mMVMatrixHandle = gl.getUniformLocation(program, "u_MVMatrix");
mLightPosHandle = gl.getUniformLocation(program, "u_LightPos");
mTextureUniformHandle = gl.getUniformLocation(program, "u_Texture");
mPositionHandle = gl.getAttribLocation(program, "a_Position");
mNormalHandle = gl.getAttribLocation(program, "a_Normal");
mTextureCoordinateHandle = gl.getAttribLocation(program, "a_TexCoordinate");
// Calculate position of the light. Rotate and then push into the distance.
Matrix.setIdentityM(mLightModelMatrix, 0);
Matrix.translateM(mLightModelMatrix, 0, 0.0f, 0.0f, -2.0f);
Matrix.rotateM(mLightModelMatrix, 0, angleInDegrees, 0.0f, 1.0f, 0.0f);
Matrix.translateM(mLightModelMatrix, 0, 0.0f, 0.0f, 3.5f);
Matrix.multiplyMV(mLightPosInWorldSpace, 0, mLightModelMatrix, 0, mLightPosInModelSpace, 0);
Matrix.multiplyMV(mLightPosInEyeSpace, 0, mViewMatrix, 0, mLightPosInWorldSpace, 0);
// Draw a cube.
// Translate the cube into the screen.
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, 0.8f, -3.5f);
// Set a matrix that contains the current rotation.
Matrix.setIdentityM(mCurrentRotation, 0);
Matrix.rotateM(mCurrentRotation, 0, mDeltaX, 0.0f, 1.0f, 0.0f);
Matrix.rotateM(mCurrentRotation, 0, mDeltaY, 1.0f, 0.0f, 0.0f);
mDeltaX = 0.1f;
mDeltaY = 0.1f;
// Multiply the current rotation by the accumulated rotation, and then set the accumulated rotation to the result.
Matrix.multiplyMM(mTemporaryMatrix, 0, mCurrentRotation, 0, mAccumulatedRotation, 0);
java.lang.System.arraycopy(mTemporaryMatrix, 0, mAccumulatedRotation, 0, 16);
// Rotate the cube taking the overall rotation into account.
Matrix.multiplyMM(mTemporaryMatrix, 0, mModelMatrix, 0, mAccumulatedRotation, 0);
java.lang.System.arraycopy(mTemporaryMatrix, 0, mModelMatrix, 0, 16);
// Set the active texture unit to texture unit 0.
gl.activeTexture(gl.TEXTURE0);
// Bind the texture to this unit.
gl.bindTexture(gl.TEXTURE_2D, mBrickDataHandle);
// Tell the texture uniform sampler to use this texture in the shader by binding to texture unit 0.
gl.uniform1i(mTextureUniformHandle, 0);
// Pass in the texture coordinate information
mCubeTextureCoordinates.position(0);
opengl.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, (int)gl.FLOAT, false,
0, mCubeTextureCoordinates);
#region drawCube
Action drawCube =
delegate
{
// Pass in the position information
mCubePositions.position(0);
opengl.glVertexAttribPointer(mPositionHandle, mPositionDataSize, (int)gl.FLOAT, false,
0, mCubePositions);
gl.enableVertexAttribArray((uint)mPositionHandle);
// Pass in the normal information
mCubeNormals.position(0);
opengl.glVertexAttribPointer(mNormalHandle, mNormalDataSize, (int)gl.FLOAT, false,
0, mCubeNormals);
gl.enableVertexAttribArray((uint)mNormalHandle);
// This multiplies the view matrix by the model matrix, and stores the result in the MVP matrix
// (which currently contains model * view).
Matrix.multiplyMM(mMVPMatrix, 0, mViewMatrix, 0, mModelMatrix, 0);
// Pass in the modelview matrix.
gl.uniformMatrix4fv(mMVMatrixHandle, false, mMVPMatrix);
// This multiplies the modelview matrix by the projection matrix, and stores the result in the MVP matrix
// (which now contains model * view * projection).
Matrix.multiplyMM(mTemporaryMatrix, 0, mProjectionMatrix, 0, mMVPMatrix, 0);
java.lang.System.arraycopy(mTemporaryMatrix, 0, mMVPMatrix, 0, 16);
// Pass in the combined matrix.
gl.uniformMatrix4fv(mMVPMatrixHandle, false, mMVPMatrix);
// Pass in the light position in eye space.
gl.uniform3f(mLightPosHandle, mLightPosInEyeSpace[0], mLightPosInEyeSpace[1], mLightPosInEyeSpace[2]);
// Draw the cube.k
gl.drawArrays(gl.TRIANGLES, 0, 36);
};
#endregion
drawCube();
// Draw a plane
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, -2.0f, -5.0f);
Matrix.scaleM(mModelMatrix, 0, 25.0f, 1.0f, 25.0f);
Matrix.rotateM(mModelMatrix, 0, slowAngleInDegrees, 0.0f, 1.0f, 0.0f);
// Set the active texture unit to texture unit 0.
gl.activeTexture(gl.TEXTURE0);
// Bind the texture to this unit.
gl.bindTexture(gl.TEXTURE_2D, mGrassDataHandle);
// Tell the texture uniform sampler to use this texture in the shader by binding to texture unit 0.
gl.uniform1i(mTextureUniformHandle, 0);
// Pass in the texture coordinate information
mCubeTextureCoordinatesForPlane.position(0);
opengl.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, (int)gl.FLOAT, false,
0, mCubeTextureCoordinatesForPlane);
gl.enableVertexAttribArray((uint)mTextureCoordinateHandle);
drawCube();
#region drawLight
Action drawLight =
delegate
{
var pointMVPMatrixHandle = gl.getUniformLocation(mPointProgramHandle, "u_MVPMatrix");
var pointPositionHandle = gl.getAttribLocation(mPointProgramHandle, "a_Position");
// Pass in the position.
gl.vertexAttrib3f((uint)pointPositionHandle, mLightPosInModelSpace[0], mLightPosInModelSpace[1], mLightPosInModelSpace[2]);
// Since we are not using a buffer object, disable vertex arrays for this attribute.
gl.disableVertexAttribArray((uint)pointPositionHandle);
// Pass in the transformation matrix.
Matrix.multiplyMM(mMVPMatrix, 0, mViewMatrix, 0, mLightModelMatrix, 0);
Matrix.multiplyMM(mTemporaryMatrix, 0, mProjectionMatrix, 0, mMVPMatrix, 0);
java.lang.System.arraycopy(mTemporaryMatrix, 0, mMVPMatrix, 0, 16);
gl.uniformMatrix4fv(pointMVPMatrixHandle, false, mMVPMatrix);
// Draw the point.
gl.drawArrays(gl.POINTS, 0, 1);
};
#endregion
// Draw a point to indicate the light.
gl.useProgram(mPointProgramHandle);
drawLight();
sw.Stop();
OwnerActivity.runOnUiThread(
delegate
{
// Caused by: java.lang.ArithmeticException: divide by zero
// at AndroidOpenGLESLesson6Activity.Shaders.ApplicationSurface___c__DisplayClass0_4.__ctor_b__14(ApplicationSurface___c__DisplayClass0_4.java:28)
// ... 20 more
//Force finishing activity AndroidOpenGLESLesson6Activity.Activities /.AndroidOpenGLESLesson6Activity
OwnerActivity.setTitle(
"" + new { sw.ElapsedMilliseconds, fps = 1000.0 / sw.ElapsedMilliseconds });
}
);
};
#endregion
};
}
