本文整理汇总了C++中camera::get_ray方法的典型用法代码示例。如果您正苦于以下问题：C++ camera::get_ray方法的具体用法？C++ camera::get_ray怎么用？C++ camera::get_ray使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类camera的用法示例。
在下文中一共展示了camera::get_ray方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: display
void display(hitable* world, camera& cam)
{
CALL_GL_API(::glClearColor(0.0f, 0.5f, 1.0f, 1.0f));
CALL_GL_API(::glClearDepthf(1.0f));
CALL_GL_API(::glClearStencil(0));
CALL_GL_API(::glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT));
CALL_GL_API(::glUseProgram(g_program));
GLfloat invScreen[4] = { 1.0f / WIDTH, 1.0f / HEIGHT, 0.0f, 0.0f };
auto hInvScreen = GetHandle(g_program, "invScreen");
CALL_GL_API(::glUniform4fv(hInvScreen, 1, invScreen));
CALL_GL_API(::glActiveTexture(GL_TEXTURE0));
CALL_GL_API(::glBindTexture(GL_TEXTURE_2D, g_tex));
auto hImage = GetHandle(g_program, "image");
CALL_GL_API(glUniform1i(hImage, 0));
{
int ns = 10;
#pragma omp for
for (int j = ny - 1; j >= 0; j--) {
for (int i = 0; i < nx; i++) {
vec3 col(0, 0, 0);
for (int s = 0; s < ns; s++) {
float u = float(i + drand48()) / float(nx);
float v = float(j + drand48()) / float(ny);
ray r = cam.get_ray(u, v);
col += color(r, world, 0);
}
col /= float(ns);
col = vec3(
sqrt(col[0]),
sqrt(col[1]),
sqrt(col[2]));
g_color[j][i][0] = int(255.99*col[0]);
g_color[j][i][1] = int(255.99*col[1]);
g_color[j][i][2] = int(255.99*col[2]);
g_color[j][i][3] = 255;
}
}
}
CALL_GL_API(::glTexSubImage2D(
GL_TEXTURE_2D,
0,
0, 0,
WIDTH, HEIGHT,
GL_RGBA,
GL_UNSIGNED_BYTE,
g_color));
CALL_GL_API(::glDrawArrays(GL_TRIANGLE_STRIP, 0, 4));
}