Java GL2.glVertexPointer方法代碼示例

import javax.media.opengl.GL2; //導入方法依賴的package包/類
protected void renderVA(DrawContext dc, RectTile tile, int numTextureUnits)
{
    //GL gl = dc.getGL();
	GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.

    gl.glVertexPointer(3, GL.GL_FLOAT, 0, tile.ri.vertices.rewind());

    for (int i = 0; i < numTextureUnits; i++)
    {
        gl.glClientActiveTexture(GL.GL_TEXTURE0 + i);
        gl.glEnableClientState(GL2.GL_TEXTURE_COORD_ARRAY);
        Object texCoords = dc.getValue(AVKey.TEXTURE_COORDINATES);
        if (texCoords != null && texCoords instanceof DoubleBuffer)
            gl.glTexCoordPointer(2, GL2.GL_FLOAT, 0, ((DoubleBuffer) texCoords).rewind());
        else
            gl.glTexCoordPointer(2, GL2.GL_FLOAT, 0, tile.ri.texCoords.rewind());
    }

    gl.glDrawElements(javax.media.opengl.GL.GL_TRIANGLE_STRIP, tile.ri.indices.limit(),
        javax.media.opengl.GL.GL_UNSIGNED_INT, tile.ri.indices.rewind());
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
private void drawInteriorVertexColorVBO(final DrawContext dc, final int[] vboIds, final PathData pathData) {

		final GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.

		final int vertexStride = pathData.getVertexStride();

		// Convert stride from number of elements to number of bytes.
		gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, vboIds[0]);
		{
			gl.glEnableClientState(GL2.GL_COLOR_ARRAY);
			{
				gl.glVertexPointer(3, GL2.GL_FLOAT, 4 * vertexStride, 0);
				gl.glColorPointer(4, GL2.GL_FLOAT, 4 * vertexStride, 4 * pathData.getColorOffset());

				gl.glDrawArrays(GL2.GL_TRIANGLE_STRIP, 0, pathData.getVertexCount());
			}
			gl.glDisableClientState(GL2.GL_COLOR_ARRAY);
		}
		gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);
	}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
/**
 * Must be called at the start of the draw phase, before any of the bodies
 * managed by this instance are drawn.
 *
 * @param gl The instance of GL2 responsible for drawing the bodies.
 * @see #endDraw Must be called in conjunction with this method.
 */
public void startDraw(GL2 gl) {
    gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
    gl.glEnableClientState(GL2.GL_NORMAL_ARRAY);
    gl.glEnableClientState(GL2.GL_TEXTURE_COORD_ARRAY);
    //Use the name under which the data buffer was stored to bind it.
    gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, dataBufferName);
    final int stride = Vertex.NR_VERTEX_ELEMENTS * Vertex.COORD_COUNT * Float.BYTES;
    /**
     * Tell OpenGL what formats and what stride length to expect when
     * extracting vertex coordinate information from the data buffer.
     */
    final int positionPointerOffset = 0 * Vertex.COORD_COUNT * Float.BYTES;
    gl.glVertexPointer(Vertex.COORD_COUNT, GL2.GL_FLOAT, stride, positionPointerOffset);
    /**
     * Tell OpenGL what formats, stride length and offset to expect when
     * extracting normal information from the data buffer.
     */
    final int normalPointerOffset = 1 * Vertex.COORD_COUNT * Float.BYTES;
    gl.glNormalPointer(GL2.GL_FLOAT, stride, normalPointerOffset);
    /**
     * Tell OpenGL what formats, stride length and offset to expect when
     * extracting texture information from the data buffer.
     */
    final int texturePointerOffset = 2 * Vertex.COORD_COUNT * Float.BYTES;
    gl.glTexCoordPointer(Vertex.COORD_COUNT, GL2.GL_FLOAT, stride, texturePointerOffset);
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
protected boolean bindVbos(DrawContext dc, RectTile tile, int numTextureUnits)
{
    int[] verticesVboId = (int[]) dc.getGpuResourceCache().get(tile.ri.vboCacheKey);
    if (verticesVboId == null)
    {
        tile.ri.fillVerticesVBO(dc);
        verticesVboId = (int[]) dc.getGpuResourceCache().get(tile.ri.vboCacheKey);
        if (verticesVboId == null)
            return false;
    }

    //GL gl = dc.getGL();
    GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
 
    // Bind vertices
    gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, verticesVboId[0]);
    gl.glVertexPointer(3, GL2.GL_FLOAT, 0, 0);

    // Bind texture coordinates
    if (numTextureUnits > 0)
    {
        Object texCoordsVboCacheKey = textureCoordVboCacheKeys.get(tile.density);
        int[] texCoordsVboId = (int[])
            (texCoordsVboCacheKey != null ? dc.getGpuResourceCache().get(texCoordsVboCacheKey) : null);
        if (texCoordsVboId == null)
            texCoordsVboId = this.fillTextureCoordsVbo(dc, tile.density, tile.ri.texCoords);
        for (int i = 0; i < numTextureUnits; i++)
        {
            gl.glClientActiveTexture(GL2.GL_TEXTURE0 + i);
            gl.glEnableClientState(GL2.GL_TEXTURE_COORD_ARRAY);

            gl.glBindBuffer(GL.GL_ARRAY_BUFFER, texCoordsVboId[0]);
            gl.glTexCoordPointer(2, GL.GL_FLOAT, 0, 0);
        }
    }

    // Bind index list
    Object indexListVboCacheKey = indexListsVboCacheKeys.get(tile.density);
    int[] indexListVboId = (int[])
        (indexListVboCacheKey != null ? dc.getGpuResourceCache().get(indexListVboCacheKey) : null);
    if (indexListVboId == null)
        indexListVboId = this.fillIndexListVbo(dc, tile.density, tile.ri.indices);
    if (indexListVboId != null)
        gl.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, indexListVboId[0]);

    return indexListVboId != null;
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
/**
 *
 * @param openGl
 */
@Override
protected final void setPointer(final GL2 openGl) {
    openGl.glEnableClientState(target());
    openGl.glVertexPointer(COORD_3D, GL2.GL_DOUBLE, NO_STRIDE, getBuffer());
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
/**
 * Draws points at this path's specified positions.
 * <p/>
 * Note: when the draw context is in picking mode, this binds the current GL_ARRAY_BUFFER to 0
 * after using the currently bound GL_ARRAY_BUFFER to specify the vertex pointer. This does not
 * restore GL_ARRAY_BUFFER to the its previous state. If the caller intends to use that buffer
 * after this method returns, the caller must bind the buffer again.
 * 
 * @param dc
 *            the current draw context.
 * @param vboIds
 *            the ids of this shapes buffers.
 * @param pathData
 *            the current globe-specific path data.
 */
@Override
protected void drawPointsVBO(final DrawContext dc, final int[] vboIds, final PathData pathData) {

	final TourTrackConfig config = TourTrackConfigManager.getActiveConfig();

	if (config.isShowTrackPosition == false) {
		return;
	}

	final double d = getDistanceMetric(dc, pathData);
	if (d > getShowPositionsThreshold()) {
		return;
	}

	final IntBuffer posPoints = pathData.getPositionPoints();
	if (posPoints == null || posPoints.limit() < 1) {
		return;
	}

	final boolean useVertexColors = pathData.getTessellatedColors() != null && isShowTrackValueColor_Outline();

	final GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.

	// Convert stride from number of elements to number of bytes.
	gl.glVertexPointer(3, GL2.GL_FLOAT, 4 * pathData.getVertexStride(), 0);

	if (dc.isPickingMode()) {

		gl.glEnableClientState(GL2.GL_COLOR_ARRAY);
		gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);
		gl.glColorPointer(3, GL2.GL_UNSIGNED_BYTE, 0, pickPositionColors);

	} else if (useVertexColors) {
		// Apply this path's per-position colors if we're in normal rendering mode (not picking) and this path's
		// positionColors is non-null. Convert the stride and offset from number of elements to number of bytes.
		gl.glEnableClientState(GL2.GL_COLOR_ARRAY);
		gl.glColorPointer(4, GL2.GL_FLOAT, 4 * pathData.getVertexStride(), 4 * pathData.getColorOffset());
	}

	prepareToDrawPoints(dc);

	gl.glBindBuffer(GL2.GL_ELEMENT_ARRAY_BUFFER, vboIds[2]);
	gl.glDrawElements(GL2.GL_POINTS, posPoints.limit(), GL2.GL_UNSIGNED_INT, 0);

	// Restore the previous GL point state.
	gl.glPointSize(1f);
	gl.glDisable(GL2.GL_POINT_SMOOTH);

	// Restore the previous GL color array state.
	if (dc.isPickingMode() || useVertexColors) {
		gl.glDisableClientState(GL2.GL_COLOR_ARRAY);
	}
}
 

import javax.media.opengl.GL2; //導入方法依賴的package包/類
@Override
    public void display(GLAutoDrawable drawable) {

        GL2 gl = drawable.getGL().getGL2();

        // ensure pipeline is clean before doing cl work
        gl.glFinish();

        computeHeightfield();

        gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
        gl.glLoadIdentity();

        usi.interact(gl);

        gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, glObjects[VERTICES]);
        gl.glVertexPointer(4, GL2.GL_FLOAT, 0, 0);

//            gl.glBindBuffer(GL2.GL_ELEMENT_ARRAY_BUFFER, glObjects[INDICES]);

        gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
        gl.glDrawArrays(GL2.GL_POINTS, 0, MESH_SIZE * MESH_SIZE);
//            gl.glDrawElements(GL2.GL_TRIANGLES, ib.capacity(), GL2.GL_UNSIGNED_INT, 0);
        gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);

//            gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, 0);

    }