public void OnDrawFrame(IGL10 gl)
 {
     // 清除屏幕缓存和深度缓存
     gl.GlClear(GL10.GlColorBufferBit | GL10.GlDepthBufferBit);
     // 启用顶点坐标数据
     gl.GlEnableClientState(GL10.GlVertexArray);
     // 启用贴图坐标数组数据
     gl.GlEnableClientState(GL10.GlTextureCoordArray);   // ①
                                                         // 设置当前矩阵模式为模型视图。
     gl.GlMatrixMode(GL10.GlModelview);
     gl.GlLoadIdentity();
     // 把绘图中心移入屏幕2个单位
     gl.GlTranslatef(0f, 0.0f, -2.0f);
     // 旋转图形
     gl.GlRotatef(ma.angleY, 0, 1, 0);
     gl.GlRotatef(ma.angleX, 1, 0, 0);
     // 设置顶点的位置数据
     gl.GlVertexPointer(3, GL10.GlFloat, 0, cubeVerticesBuffer);
     // 设置贴图的坐标数据
     gl.GlTexCoordPointer(2, GL10.GlFloat, 0, cubeTexturesBuffer); // ②
                                                                   // 执行纹理贴图
     gl.GlBindTexture(GL10.GlTexture2d, texture);                  // ③
                                                                   // 按cubeFacetsBuffer指定的面绘制三角形
     gl.GlDrawElements(GL10.GlTriangles, cubeFacetsBuffer.Remaining(),
                       GL10.GlUnsignedByte, cubeFacetsBuffer);
     // 绘制结束
     gl.GlFinish();
     // 禁用顶点、纹理坐标数组
     gl.GlDisableClientState(GL10.GlVertexArray);
     gl.GlDisableClientState(GL10.GlTextureCoordArray);
     // 递增角度值以便每次以不同角度绘制
 }
Пример #2
0
        public void Unbind()
        {
            IGL10 gl = _glGraphics.GL10;

            if (_hasTexCoords)
            {
                gl.GlDisableClientState(GL10.GlTextureCoordArray);
            }

            if (_hasColor)
            {
                gl.GlDisableClientState(GL10.GlColorArray);
            }
        }
Пример #3
0
      public void Draw(IGL10 gl)
      {
         gl.GlFrontFace(IGL10Constants.GL_CW);

         gl.GlVertexPointer(3, IGL10Constants.GL_FLOAT, 0, mVertexBuffer);
         gl.GlColorPointer(4, IGL10Constants.GL_FLOAT, 0, mColorBuffer);

         gl.GlEnableClientState(IGL10Constants.GL_VERTEX_ARRAY);
         gl.GlEnableClientState(IGL10Constants.GL_COLOR_ARRAY);

         // draw all 36 triangles
         gl.GlDrawElements(IGL10Constants.GL_TRIANGLES, 36, IGL10Constants.GL_UNSIGNED_BYTE,
                           mIndexBuffer);

         gl.GlDisableClientState(IGL10Constants.GL_VERTEX_ARRAY);
         gl.GlDisableClientState(IGL10Constants.GL_COLOR_ARRAY);
      }
Пример #4
0
        public void Draw(IGL10 gl)
        {
            gl.GlFrontFace(IGL10Constants.GL_CW);

            gl.GlVertexPointer(3, IGL10Constants.GL_FLOAT, 0, mVertexBuffer);
            gl.GlColorPointer(4, IGL10Constants.GL_FLOAT, 0, mColorBuffer);

            gl.GlEnableClientState(IGL10Constants.GL_VERTEX_ARRAY);
            gl.GlEnableClientState(IGL10Constants.GL_COLOR_ARRAY);

            // draw all 36 triangles
            gl.GlDrawElements(IGL10Constants.GL_TRIANGLES, 36, IGL10Constants.GL_UNSIGNED_BYTE,
                              mIndexBuffer);

            gl.GlDisableClientState(IGL10Constants.GL_VERTEX_ARRAY);
            gl.GlDisableClientState(IGL10Constants.GL_COLOR_ARRAY);
        }
Пример #5
0
        public void OnDrawFrame(IGL10 gl)
        {
            // First allocate texture if there is not one yet.
            if (DRAW_TEXTURE && mTextureIds == null)
            {
                // Generate texture.
                mTextureIds = new int[2];
                gl.GlGenTextures(2, mTextureIds, 0);
                foreach (int textureId in mTextureIds)
                {
                    // Set texture attributes.
                    gl.GlBindTexture(GL10.GlTexture2d, textureId);
                    gl.GlTexParameterf(GL10.GlTexture2d,
                                       GL10.GlTextureMinFilter, GL10.GlNearest);
                    gl.GlTexParameterf(GL10.GlTexture2d,
                                       GL10.GlTextureMagFilter, GL10.GlNearest);
                    gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureWrapS,
                                       GL10.GlClampToEdge);
                    gl.GlTexParameterf(GL10.GlTexture2d, GL10.GlTextureWrapT,
                                       GL10.GlClampToEdge);
                }
            }

            if (DRAW_TEXTURE && mTexturePage.TexturesChanged)
            {
                gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[0]);
                Bitmap texture = mTexturePage.GetTexture(mTextureRectFront,
                                                         CurlPage.SIDE_FRONT);
                GLUtils.TexImage2D(GL10.GlTexture2d, 0, texture, 0);
                texture.Recycle();

                mTextureBack = mTexturePage.HasBackTexture;
                if (mTextureBack)
                {
                    gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[1]);
                    texture = mTexturePage.GetTexture(mTextureRectBack,
                                                      CurlPage.SIDE_BACK);
                    GLUtils.TexImage2D(GL10.GlTexture2d, 0, texture, 0);
                    texture.Recycle();
                }
                else
                {
                    mTextureRectBack.Set(mTextureRectFront);
                }

                mTexturePage.Recycle();
                Reset();
            }

            // Some 'global' settings.
            gl.GlEnableClientState(GL10.GlVertexArray);

            // TODO: Drop shadow drawing is done temporarily here to hide some
            // problems with its calculation.
            if (DRAW_SHADOW)
            {
                gl.GlDisable(GL10.GlTexture2d);
                gl.GlEnable(GL10.GlBlend);
                gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
                gl.GlEnableClientState(GL10.GlColorArray);
                gl.GlColorPointer(4, GL10.GlFloat, 0, mBufShadowColors);
                gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufShadowVertices);
                gl.GlDrawArrays(GL10.GlTriangleStrip, 0, mDropShadowCount);
                gl.GlDisableClientState(GL10.GlColorArray);
                gl.GlDisable(GL10.GlBlend);
            }

            if (DRAW_TEXTURE)
            {
                gl.GlEnableClientState(GL10.GlTextureCoordArray);
                gl.GlTexCoordPointer(2, GL10.GlFloat, 0, mBufTexCoords);
            }
            gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufVertices);
            // Enable color array.
            gl.GlEnableClientState(GL10.GlColorArray);
            gl.GlColorPointer(4, GL10.GlFloat, 0, mBufColors);

            // Draw front facing blank vertices.
            gl.GlDisable(GL10.GlTexture2d);
            gl.GlDrawArrays(GL10.GlTriangleStrip, 0, mVerticesCountFront);

            // Draw front facing texture.
            if (DRAW_TEXTURE)
            {
                gl.GlEnable(GL10.GlBlend);
                gl.GlEnable(GL10.GlTexture2d);

                if (!mFlipTexture || !mTextureBack)
                {
                    gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[0]);
                }
                else
                {
                    gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[1]);
                }

                gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
                gl.GlDrawArrays(GL10.GlTriangleStrip, 0, mVerticesCountFront);

                gl.GlDisable(GL10.GlBlend);
                gl.GlDisable(GL10.GlTexture2d);
            }

            int backStartIdx = Math.Max(0, mVerticesCountFront - 2);
            int backCount    = mVerticesCountFront + mVerticesCountBack - backStartIdx;

            // Draw back facing blank vertices.
            gl.GlDrawArrays(GL10.GlTriangleStrip, backStartIdx, backCount);

            // Draw back facing texture.
            if (DRAW_TEXTURE)
            {
                gl.GlEnable(GL10.GlBlend);
                gl.GlEnable(GL10.GlTexture2d);

                if (mFlipTexture || !mTextureBack)
                {
                    gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[0]);
                }
                else
                {
                    gl.GlBindTexture(GL10.GlTexture2d, mTextureIds[1]);
                }

                gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
                gl.GlDrawArrays(GL10.GlTriangleStrip, backStartIdx, backCount);

                gl.GlDisable(GL10.GlBlend);
                gl.GlDisable(GL10.GlTexture2d);
            }

            // Disable textures and color array.
            gl.GlDisableClientState(GL10.GlTextureCoordArray);
            gl.GlDisableClientState(GL10.GlColorArray);

            if (DRAW_POLYGON_OUTLINES)
            {
                gl.GlEnable(GL10.GlBlend);
                gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
                gl.GlLineWidth(1.0f);
                gl.GlColor4f(0.5f, 0.5f, 1.0f, 1.0f);
                gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufVertices);
                gl.GlDrawArrays(GL10.GlLineStrip, 0, mVerticesCountFront);
                gl.GlDisable(GL10.GlBlend);
            }

            if (DRAW_CURL_POSITION)
            {
                gl.GlEnable(GL10.GlBlend);
                gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
                gl.GlLineWidth(1.0f);
                gl.GlColor4f(1.0f, 0.5f, 0.5f, 1.0f);
                gl.GlVertexPointer(2, GL10.GlFloat, 0, mBufCurlPositionLines);
                gl.GlDrawArrays(GL10.GlLines, 0, mCurlPositionLinesCount * 2);
                gl.GlDisable(GL10.GlBlend);
            }

            if (DRAW_SHADOW)
            {
                gl.GlEnable(GL10.GlBlend);
                gl.GlBlendFunc(GL10.GlSrcAlpha, GL10.GlOneMinusSrcAlpha);
                gl.GlEnableClientState(GL10.GlColorArray);
                gl.GlColorPointer(4, GL10.GlFloat, 0, mBufShadowColors);
                gl.GlVertexPointer(3, GL10.GlFloat, 0, mBufShadowVertices);
                gl.GlDrawArrays(GL10.GlTriangleStrip, mDropShadowCount,
                                mSelfShadowCount);
                gl.GlDisableClientState(GL10.GlColorArray);
                gl.GlDisable(GL10.GlBlend);
            }

            gl.GlDisableClientState(GL10.GlVertexArray);
        }