void Ex08_13::Display()
{
static const unsigned int start_time = GetTickCount() - 50000;
float t = float((GetTickCount() - start_time)) / float(0x3FFF);
static const vmath::vec3 X(1.0f, 0.0f, 0.0f);
static const vmath::vec3 Y(0.0f, 1.0f, 0.0f);
static const vmath::vec3 Z(0.0f, 0.0f, 1.0f);
vmath::mat4 tc_matrix(vmath::mat4::identity());
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glDisable(GL_CULL_FACE);
float aspect = float(getHeight()) / getWidth();
glUseProgram(object_prog);
tc_matrix = vmath::translate(vmath::vec3(0.0f, 0.0f, -1.5f)) *
vmath::rotate(80.0f * 3.0f * t, Y) * vmath::rotate(50.0f * 3.0f * t, Z);
glUniformMatrix4fv(object_mat_mv_loc, 1, GL_FALSE, tc_matrix);
tc_matrix = vmath::perspective(35.0f, 1.0f / aspect, 0.1f, 100.0f) * tc_matrix;
glUniformMatrix4fv(object_mat_mvp_loc, 1, GL_FALSE, tc_matrix);
glBindVertexArray(vao);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
Swap();
}
void Ex06_16::Display()
{
static const unsigned int start_time = GetTickCount() - 50000;
float t = float((GetTickCount() - start_time)) / float(0x3FFF);
static const vmath::vec3 X(1.0f, 0.0f, 0.0f);
static const vmath::vec3 Y(0.0f, 1.0f, 0.0f);
static const vmath::vec3 Z(0.0f, 0.0f, 1.0f);
vmath::mat4 tc_matrix(vmath::mat4::identity());
glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDisable(GL_CULL_FACE);
glUseProgram(base_prog);
tc_matrix = vmath::rotate(t * 170.0f, X) *
vmath::rotate(t * 137.0f, Y) *
vmath::rotate(t * 93.0f, Z);
glUniformMatrix4fv(tc_rotate_loc, 1, GL_FALSE, tc_matrix);
glBindVertexArray(vao);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
Swap();
}
void CubeMapExample::Display(bool auto_redraw)
{
static const unsigned int start_time = GetTickCount();
float t = float((GetTickCount() - start_time)) / float(0x3FFF);
static const vmath::vec3 X(1.0f, 0.0f, 0.0f);
static const vmath::vec3 Y(0.0f, 1.0f, 0.0f);
static const vmath::vec3 Z(0.0f, 0.0f, 1.0f);
vmath::mat4 tc_matrix(vmath::mat4::identity());
glClearColor(0.0f, 0.25f, 0.3f, 1.0f);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glDisable(GL_CULL_FACE);
//调用天空盒映射着色器程序
glUseProgram(skybox_prog);
//GL_TEXTURE_CUBE_MAP_SEAMLESS启用无缝立方体映射滤波，避免立方体映射相邻边之间的缝
glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
tc_matrix = vmath::rotate(80.0f * 3.0f * t, Y);// * vmath::rotate(22.0f, Z);
tc_matrix = vmath::perspective(35.0f, 1.0f / aspect, 0.1f, 100.0f) * tc_matrix;
glUniformMatrix4fv(skybox_rotate_loc, 1, GL_FALSE, tc_matrix);
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cube_element_buffer);
//绘制天空盒，完成立方体映射
glDrawElements(GL_TRIANGLE_STRIP, 8, GL_UNSIGNED_SHORT, NULL);
glDrawElements(GL_TRIANGLE_STRIP, 8, GL_UNSIGNED_SHORT, BUFFER_OFFSET(8 * sizeof(GLushort)));
//调用环境映射着色器程序
glUseProgram(object_prog);
tc_matrix = vmath::translate(vmath::vec3(0.0f, 0.0f, -4.0f)) *
vmath::rotate(80.0f * 3.0f * t, Y) * vmath::rotate(70.0f * 3.0f * t, Z);
glUniformMatrix4fv(object_mat_mv_loc, 1, GL_FALSE, tc_matrix);
tc_matrix = vmath::perspective(35.0f, 1.0f / aspect, 0.1f, 100.0f) * tc_matrix;
glUniformMatrix4fv(object_mat_mvp_loc, 1, GL_FALSE, tc_matrix);
glClear(GL_DEPTH_BUFFER_BIT);
//绘制物体，完成环境映射
object.Render();
base::Display();
}
void Ex09_08::Display()
{
vmath::mat4 tc_matrix(vmath::mat4::identity());
float aspect = float(getHeight()) / getWidth();
glUseProgram(program);
tc_matrix = vmath::translate(vmath::vec3(-0.1f, -1.0f, -2.9f));
glUniformMatrix4fv(MVLoc, 1, GL_FALSE, tc_matrix);
tc_matrix = vmath::perspective(35.0f, 1.0f / aspect, 0.1f, 100.0f) * tc_matrix;
glUniformMatrix4fv(PLoc, 1, GL_FALSE, tc_matrix);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glDrawElements( GL_PATCHES, NumTeapotVertices,
GL_UNSIGNED_INT, BUFFER_OFFSET(0) );
Swap();
}
