使光源在 OpenGL 中可见
我想在我的 OpenGL 场景中移动光源,它正在工作。但实际上我也想看看你的光源。
我该怎么做?
...
glPushMatrix();
GLfloat lightPos[] = {0, 0, 200, 1};
glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
GLfloat ambientLight[] = { 0.2, 0.2, 0.2, 1.0};
GLfloat lightColor[] = { 0.5, 0.5, 0.5, 1.0};
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
glLightfv(GL_LIGHT0, GL_SPECULAR, lightColor);
glutSolidSphere(5,50,50);
glPopMatrix();
...
I want to move my light source in my OpenGL-Scene, which is working. But to actually I want to see thee light source as well.
How can I do this?
...
glPushMatrix();
GLfloat lightPos[] = {0, 0, 200, 1};
glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
GLfloat ambientLight[] = { 0.2, 0.2, 0.2, 1.0};
GLfloat lightColor[] = { 0.5, 0.5, 0.5, 1.0};
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight);
glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
glLightfv(GL_LIGHT0, GL_SPECULAR, lightColor);
glutSolidSphere(5,50,50);
glPopMatrix();
...
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光源本身并不是可见物体。如果你想“看到”灯光,你必须在灯光所在的位置放置一些物体。也许使用球体、精灵、箭头(如果是定向光,则指向光所指向的方向)等。
A light source is not a visible object, per se. If you want to "see" a light, you have to place some object at the position that your light is. Maybe use a sphere, a sprite, an arrow (pointing in the direction the light is pointing in, if it's a directional light), etc.