void RENDER_INPUT::PushShadowMatrices()
{
glActiveTexture(GL_TEXTURE3);
glMatrixMode(GL_TEXTURE);
MATRIX4<float> m;
glGetFloatv (GL_TEXTURE_MATRIX, m.GetArray());
m = m.Inverse();
//std::cout << m << std::endl;
for (int i = 0; i < 3; i++)
{
glActiveTexture(GL_TEXTURE4+i);
glPushMatrix();
glMultMatrixf(m.GetArray());
}
glActiveTexture(GL_TEXTURE0);
glMatrixMode(GL_MODELVIEW);
}
void GRAPHICS_GL2::ChangeDisplay(
const int width, const int height,
std::ostream & error_output)
{
glViewport(0, 0, (GLint)width, (GLint)height);
GLfloat ratio = (GLfloat)width / (GLfloat)height;
MATRIX4<float> m;
glMatrixMode(GL_PROJECTION);
m.Perspective(45.0f, ratio, 0.1f, 100.0f);
glLoadMatrixf(m.GetArray());
glMatrixMode(GL_MODELVIEW);
m.LoadIdentity();
glLoadMatrixf(m.GetArray());
GLUTIL::CheckForOpenGLErrors("ChangeDisplay", error_output);
w = width;
h = height;
}
void GRAPHICS_GL2::SetupScene(
float fov, float new_view_distance,
const MATHVECTOR <float, 3> cam_position,
const QUATERNION <float> & cam_rotation,
const MATHVECTOR <float, 3> & dynamic_reflection_sample_pos)
{
// setup the default camera from the passed-in parameters
{
GRAPHICS_CAMERA & cam = cameras["default"];
cam.fov = fov;
cam.pos = cam_position;
cam.orient = cam_rotation;
cam.view_distance = new_view_distance;
cam.w = w;
cam.h = h;
}
// create a camera for the skybox with a long view distance
{
GRAPHICS_CAMERA & cam = cameras["skybox"];
cam = cameras["default"];
cam.view_distance = 10000.0;
}
// create a camera for 3d ui elements that has a fixed FOV
{
GRAPHICS_CAMERA & cam = cameras["ui3d"];
cam.fov = 45;
cam.pos = cam_position;
cam.orient = cam_rotation;
cam.view_distance = new_view_distance;
cam.w = w;
cam.h = h;
}
// create a camera for the dynamic reflections
{
GRAPHICS_CAMERA & cam = cameras["dynamic_reflection"];
cam.pos = dynamic_reflection_sample_pos;
cam.fov = 90; // this gets automatically overridden with the correct fov (which is 90 anyway)
cam.orient.LoadIdentity(); // this gets automatically rotated for each cube side
cam.view_distance = 100.f;
cam.w = 1.f; // this gets automatically overridden with the cubemap dimensions
cam.h = 1.f; // this gets automatically overridden with the cubemap dimensions
}
// create a camera for the dynamic reflection skybox
{
GRAPHICS_CAMERA & cam = cameras["dynamic_reflection_skybox"];
cam = cameras["dynamic_reflection"];
cam.view_distance = 10000.f;
}
// create an ortho camera for 2d drawing
{
GRAPHICS_CAMERA & cam = cameras["2d"];
// this is the glOrtho call we want: glOrtho( 0, 1, 1, 0, -1, 1 );
cam.orthomode = true;
cam.orthomin = MATHVECTOR <float, 3> (0, 1, -1);
cam.orthomax = MATHVECTOR <float, 3> (1, 0, 1);
}
// put the default camera transform into texture3, needed by shaders only
MATRIX4<float> viewMatrix;
cam_rotation.GetMatrix4(viewMatrix);
float translate[4] = {-cam_position[0], -cam_position[1], -cam_position[2], 0};
viewMatrix.MultiplyVector4(translate);
viewMatrix.Translate(translate[0], translate[1], translate[2]);
glActiveTexture(GL_TEXTURE3);
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(viewMatrix.GetArray());
// create cameras for shadow passes
if (shadows)
{
MATRIX4<float> viewMatrixInv = viewMatrix.Inverse();
std::vector <std::string> shadow_names;
shadow_names.push_back("near");
shadow_names.push_back("medium");
shadow_names.push_back("far");
for (int i = 0; i < 3; i++)
{
float shadow_radius = (1<<i)*closeshadow+(i)*20.0; //5,30,60
MATHVECTOR <float, 3> shadowbox(1,1,1);
shadowbox = shadowbox * (shadow_radius*sqrt(2.0));
MATHVECTOR <float, 3> shadowoffset(0,0,-1);
shadowoffset = shadowoffset * shadow_radius;
(-cam_rotation).RotateVector(shadowoffset);
shadowbox[2] += 60.0;
GRAPHICS_CAMERA & cam = cameras["shadows_"+shadow_names[i]];
cam = cameras["default"];
cam.orthomode = true;
cam.orthomin = -shadowbox;
cam.orthomax = shadowbox;
cam.pos = cam.pos + shadowoffset;
cam.orient = lightdirection;
// go through and extract the clip matrix, storing it in a texture matrix
// premultiply the clip matrix with default camera view inverse matrix
renderscene.SetOrtho(cam.orthomin, cam.orthomax);
renderscene.SetCameraInfo(cam.pos, cam.orient, cam.fov, cam.view_distance, cam.w, cam.h);
MATRIX4<float> clipmat;
clipmat.Scale(0.5f);
clipmat.Translate(0.5f, 0.5f, 0.5f);
clipmat = renderscene.GetProjMatrix().Multiply(clipmat);
clipmat = renderscene.GetViewMatrix().Multiply(clipmat);
clipmat = viewMatrixInv.Multiply(clipmat);
glActiveTexture(GL_TEXTURE4+i);
glLoadMatrixf(clipmat.GetArray());
}
}
glMatrixMode(GL_MODELVIEW);
glActiveTexture(GL_TEXTURE0);
}
