void PaintWidget::resizeGL(int width, int height)
{
// Set the viewport size.
viewport(0, 0, width, height);
// Set projection matrix to some fixed values
WMatrix4x4 proj;
proj.perspective(45, ((double)width)/height, 1, 40);
uniformMatrix4(pMatrixUniform_, proj);
}
void paintGL()
{
// Drawing starts here!
//clearColor(0.8, 0.8, 0.8, 1);
clearColor(0, 0, 0, 1);
clearDepth(1);
disable(DEPTH_TEST);
disable(CULL_FACE);
depthFunc(LEQUAL);
viewport(0, 0, 640, 360);
clear(COLOR_BUFFER_BIT | DEPTH_BUFFER_BIT);
WMatrix4x4 proj;
proj.perspective(90, 1, 1, 40);
useProgram(shaderProgram_);
// Set projection matrix
uniformMatrix4(pMatrixUniform_, proj);
uniformMatrix4(cMatrixUniform_, jsMatrix_);
// Draw the scene
#if 0
bindBuffer(ARRAY_BUFFER, triangleVertexPositionBuffer_);
vertexAttribPointer(vertexPositionAttribute_, 3, FLOAT, false, 0, 0);
bindBuffer(ARRAY_BUFFER, triangleVertexColorBuffer_);
vertexAttribPointer(vertexColorAttribute_, 4, FLOAT, false, 0, 0);
WMatrix4x4 modelMatrix1(
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
-2.0, 0, 0, 1
);
modelMatrix1.rotate(45, 0, 1, 0);
uniformMatrix4fv(mvMatrixUniform_, false, modelMatrix1);
drawArrays(TRIANGLES, 0, 3);
#endif
bindBuffer(ARRAY_BUFFER, squareVertexPositionBuffer_);
vertexAttribPointer(vertexPositionAttribute_, 3, FLOAT, false, 0, 0);
bindBuffer(ARRAY_BUFFER, squareVertexColorBuffer_);
vertexAttribPointer(vertexColorAttribute_, 4, FLOAT, false, 0, 0);
WMatrix4x4 modelMatrix2(
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
);
//modelMatrix2.rotate(45, 1, 0, 0);
//modelMatrix2.translate(0, 0, -2);
uniformMatrix4(mvMatrixUniform_, modelMatrix2);
//drawArrays(TRIANGLE_STRIP, 0, 4);
bindBuffer(ELEMENT_ARRAY_BUFFER, squareElementBuffer_);
drawElements(TRIANGLE_STRIP, 4, DT_UNSIGNED_BYTE, 0);
#if 0
// now draw something textured
useProgram(texShaderProgram_);
uniformMatrix4fv(texPMatrixUniform_, false, projectionMatrix);
//WMatrix4x4 mm3(
// 2, 0, 0, 0,
// 0, 1, 0, -2.5,
// 0, 0, 1, 0,
// 0, 0, 0, 1
// );
WMatrix4x4 mm3;
//mm3.scale(.5, 2, 1);
mm3.rotate(45, 0, 0, 1);
uniformMatrix4fv(texMvMatrixUniform_, false, mm3.data());
bindBuffer(ARRAY_BUFFER, textureCoordBuffer_);
vertexAttribPointer(texCoordAttribute_, 2, FLOAT, false, 0, 0);
activeTexture(TEXTURE0);
bindTexture(TEXTURE_2D, texture_);
uniform1i(texSamplerUniform_, 0);
bindBuffer(ARRAY_BUFFER, squareVertexPositionBuffer_);
vertexAttribPointer(texVertexPositionAttribute_, 3, FLOAT, false, 0, 0);
drawArrays(TRIANGLE_STRIP, 0, 4);
#endif
}
void DrawGLWidget::paintGL()
{
clear(COLOR_BUFFER_BIT | DEPTH_BUFFER_BIT);
// Reset Z-buffer, enable Z-buffering
// Draw Cube
// set perspective matrix
WMatrix4x4 pMatrix;
pMatrix.perspective(45,1,0.1,100.0);
uniformMatrix4(pMatrixUniform_, pMatrix);
//set model-view matrix
WMatrix4x4 mvMatrix;
mvMatrix.setToIdentity();
mvMatrix.translate(0.0,0.0,zDepth);
//WMatrix4x4 rotMatrix;
//rotMatrix.rotate(angleX,-1.0, 0.0, 0.0);
//rotMatrix.rotate(angleY, 0.0, 1.0, 0.0);
uniformMatrix4(cMatrixUniform_, rotMatrix);
//set model-view matrix
uniformMatrix4(mvMatrixUniform_, mvMatrix);
//
uniformMatrix4(nMatrixUniform_, rotMatrix.inverted().transposed());
activeTexture(TEXTURE0);
bindTexture(TEXTURE_2D,texture);
uniform1i(samplerUniform_,0);
uniform1i(useLightingUniform_,useLighting);
uniform3f(ambientColorUniform_,ambientColor.values[0],ambientColor.values[1],ambientColor.values[2]);
uniform3f(lightingDirectionUniform_,lightDirection.values[0],lightDirection.values[1],lightDirection.values[2]);
uniform3f(directionalColorUniform_,lightColor.values[0],lightColor.values[1],lightColor.values[2]);
bindBuffer(ARRAY_BUFFER, cubeVertexPositionBuffer);
vertexAttribPointer(vertexPositionAttribute_,
cubeVertices.itemsize_, // size: Every vertex has an X, Y and Z component
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
0, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer
bindBuffer(ARRAY_BUFFER, cubeVertexNormalBuffer);
vertexAttribPointer(vertexNormalAttribute_,
cubeNormals.itemsize_, // size: Every vertex has an X, Y and Z component
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
0, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer
bindBuffer(ARRAY_BUFFER, cubeTextureCoordBuffer);
vertexAttribPointer(textureCoordAttribute_,
cubeTexCoord.itemsize_, // size: Every vertex has RGBA components
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
0, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer*/
bindBuffer(ELEMENT_ARRAY_BUFFER, cubeVertexIndexBuffer);
drawElements(TRIANGLES,cubeIndices.numel_,UNSIGNED_SHORT,0);
}
void DrawGLWidget::paintGL()
{
clear(COLOR_BUFFER_BIT | DEPTH_BUFFER_BIT);
// Reset Z-buffer, enable Z-buffering
bindBuffer(ARRAY_BUFFER, triangleVertexPositionBuffer);
// set perspective matrix
WMatrix4x4 pMatrix;
pMatrix.perspective(45,1,0.1,100.0);
jsMatrix_ = createJavaScriptMatrix4();
setJavaScriptMatrix4(jsMatrix_, pMatrix);
uniformMatrix4(pMatrixUniform_, jsMatrix_);
//set model-view matrix
WMatrix4x4 mvMatrix;
mvMatrix.setToIdentity();
mvMatrix.translate(-1.5,0.0,-7.0);
setJavaScriptMatrix4(jsMatrix_, mvMatrix);
uniformMatrix4(mvMatrixUniform_, jsMatrix_);
vertexAttribPointer(vertexPositionAttribute_,
3, // size: Every vertex has an X, Y and Z component
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
3*4, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer
bindBuffer(ARRAY_BUFFER, triangleVertexColorBuffer);
vertexAttribPointer(vertexColorAttribute_,
4, // size: Every vertex has an X, Y and Z component
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
4*4, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer
drawArrays(TRIANGLES, 0, 3);
bindBuffer(ARRAY_BUFFER, squareVertexPositionBuffer);
// set perspective matrix
setJavaScriptMatrix4(jsMatrix_, pMatrix);
uniformMatrix4(pMatrixUniform_, jsMatrix_);
//set model-view matrix
mvMatrix.translate(3.0,0.0,0.0);
setJavaScriptMatrix4(jsMatrix_, mvMatrix);
uniformMatrix4(mvMatrixUniform_, jsMatrix_);
vertexAttribPointer(vertexPositionAttribute_,
3, // size: Every vertex has an X, Y and Z component
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
3*4, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer
bindBuffer(ARRAY_BUFFER, squareVertexColorBuffer);
vertexAttribPointer(vertexColorAttribute_,
4, // size: Every vertex has an X, Y and Z component
FLOAT, // type: They are floats
false, // normalized: Please, do NOT normalize the vertices
4*4, // stride: The first byte of the next vertex is located this
// amount of bytes further. The format of the VBO is
// vx, vy, vz, nx, ny, nz and every element is a
// Float32, hence 4 bytes large
0); // offset: The byte position of the first vertex in the buffer
drawArrays(TRIANGLE_STRIP, 0, 4); // What are you going to draw, Offset , Number of elements
}
