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Bài giải bài tập Đồ họa máy tính
Faculty of Computer Science and Engineering Department of Computer Science Bài tập 1 1/ Độ phân giải là 1280x1024 I) b = 20 , không LUT Dung lượng bộ nhớ = 1280 x 1024 x 20 = 26 214 400 bit = 3 276 800 byte II) b = 20, w = 24; Dung lượng bộ nhớ = 1280 x 1024 x 20 + 2^20 * 24 = 51 380 224 bit = 6 422 528 byte III)b = 8, w = 24; Dung lượng bộ nhớ = 1280 x 1024 x 8 + 2^8 * 24 = 10 491 904 bit = 1 311 488 byte IV)b = 10, không có LUT Dung lượng bộ nhớ = 1280 x 1024 x 10 = 13 107 200 bit = 1 638 400 byte 2/ a) Thời gian đọc 1 pixel: T = 1/(72×800×600) (s) = 28.935 ns b) Thời gian đọc 1 pixel: T = 1/((60/2)×1280×960) (s) = 27.127 ns 3/ GLfloat v0[2] = {1,1}; GLfloat v1[2] = {2,3}; GLfloat v2[2] = {4,1}; GLfloat v3[2] = {6,2}; GLfloat v4[2] = {9,3}; GLfloat v5[2] = {7,5}; a) glBegin(GL_TRIANGLES); Faculty of Computer Science and Engineering Department of Computer Science glVertex2fv(v0); glVertex2fv(v1); glVertex2fv(v2); glVertex2fv(v3); glVertex2fv(v4); glVertex2fv(v5); glEnd( ); b) glBegin(GL_TRIANGLE_STRIP); glVertex2fv(v0); glVertex2fv(v1); glVertex2fv(v2); glVertex2fv(v5); glVertex2fv(v3); glVertex2fv(v4); glEnd( ); c) glBegin(GL_TRIANGLE_FAN); glVertex2fv(v5); glVertex2fv(v1); glVertex2fv(v0); glVertex2fv(v2); glVertex2fv(v3); glVertex2fv(v4); glEnd( ); Faculty of Computer Science and Engineering Department of Computer Science d) glBegin(GL_TRIANGLE_STRIP); glVertex2fv(v0); glVertex2fv(v2); glVertex2fv(v1); glVertex2fv(v3); glVertex2fv(v5); glVertex2fv(v4); glEnd( ); e) glBegin(GL_QUAD_STRIP); glVertex2fv(v0); glVertex2fv(v2); glVertex2fv(v1); glVertex2fv(v3); glVertex2fv(v5); glVertex2fv(v4); glEnd( ); Câu 4: GLfloat v0[2] = {400, 550}; GLfloat v1[2] = {530, 475}; GLfloat v2[2] = {530, 325}; GLfloat v3[2] = {400, 250}; GLfloat v4[2] = {270, 325}; GLfloat v5[2] = {270, 475}; Faculty of Computer Science and Engineering Department of Computer Science GLfloat v6[2] = {400, 700}; GLfloat v7[2] = {530, 625}; GLfloat v8[2] = {660, 400}; GLfloat v9[2] = {660, 250}; GLfloat v10[2] = {530, 175}; GLfloat v11[2] = {270, 175}; GLfloat v12[2] = {140, 250}; GLfloat v13[2] = {140, 400}; GLfloat v14[2] = {270, 625}; void drawLogo( ){ glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); glLineWidth(2.0); glBegin(GL_LINE_LOOP); glVertex2fv(v0); glVertex2fv(v8); glVertex2fv(v9); glVertex2fv(v10); glVertex2fv(v4); glVertex2fv(v14); glVertex2fv(v6); glVertex2fv(v7); glVertex2fv(v2); glVertex2fv(v11); glVertex2fv(v12); glVertex2fv(v13); glEnd( ); glBegin(GL_LINES); Faculty of Computer Science and Engineering Department of Computer Science glVertex2fv(v0); glVertex2fv(v6); glVertex2fv(v2); glVertex2fv(v9); glVertex2fv(v4); glVertex2fv(v12); glEnd( ); } 5/ Vẽ bằng lệnh: glutWireCube(1); Vẽ bằng các Polygon: GLfloat v0[3] = {0.5,0.5,-0.5}; GLfloat v1[3] = {0.5,-0.5,-0.5}; GLfloat v2[3] = {0.5,-0.5,0.5}; GLfloat v3[3] = {0.5,0.5,0.5}; GLfloat v4[3] = {-0.5,0.5,0.5}; GLfloat v5[3] = {-0.5,-0.5,0.5}; GLfloat v6[3] = {-0.5,-0.5,-0.5}; GLfloat v7[3] = {-0.5,0.5,-0.5}; glBegin(GL_QUAD_STRIP); glVertex3fv(v0); glVertex3fv(v1); glVertex3fv(v3); glVertex3fv(v2); Faculty of Computer Science and Engineering Department of Computer Science glVertex3fv(v4); glVertex3fv(v5); glVertex3fv(v7); glVertex3fv(v6); glVertex3fv(v0); glVertex3fv(v1); glEnd( );