// return m0 * m1
MATRIX4 operator *(const MATRIX4 & m0, const MATRIX4 & m1)
{
MATRIX4 result;
for (int i = 0; i < m0.Dimension(); i++)
for (int j = 0; j < m0.Dimension(); j++) {
result[i][j] = 0;
for (int k = 0; k < m0.Dimension(); k++)
result[i][j] += m0(i,k) * m1(k,j);
};
return(result);
}
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;
}
/*
This function sets rot_parent_current data member.
Rotation from this bone local coordinate system
to the coordinate system of its parent
*/
void Skeleton::compute_rotation_parent_child(Bone *parent, Bone *child)
{
if(child != NULL)
{
MATRIX4 Rz = MATRIX4::RotationZ(-parent->axis_z * M_PI / 180.0);
MATRIX4 Ry = MATRIX4::RotationY(-parent->axis_y * M_PI / 180.0);
MATRIX4 Rx = MATRIX4::RotationX(-parent->axis_x * M_PI / 180.0);
MATRIX4 tmp1 = Rx * Ry * Rz;
Rz = MATRIX4::RotationZ(child->axis_z * M_PI / 180.0);
Ry = MATRIX4::RotationY(child->axis_y * M_PI / 180.0);
Rx = MATRIX4::RotationX(child->axis_x * M_PI / 180.0);
MATRIX4 tmp2 = Rz * Ry * Rx;
MATRIX4 tmp = tmp1 * tmp2;
tmp = tmp.transpose();
for (int x = 0; x < 4; x++)
for (int y = 0; y < 4; y++)
child->rot_parent_current[x][y] = tmp[x][y];
}
}
void RENDER_INPUT_POSTPROCESS::Render(GLSTATEMANAGER & glstate, std::ostream & error_output)
{
assert(shader);
OPENGL_UTILITY::CheckForOpenGLErrors("postprocess begin", error_output);
glstate.SetColorMask(writecolor, writealpha);
glstate.SetDepthMask(writedepth);
if (clearcolor && cleardepth)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
else if (clearcolor)
glClear(GL_COLOR_BUFFER_BIT);
else if (cleardepth)
glClear(GL_DEPTH_BUFFER_BIT);
shader->Enable();
OPENGL_UTILITY::CheckForOpenGLErrors("postprocess shader enable", error_output);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho( 0, 1, 0, 1, -1, 1 );
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glColor4f(1,1,1,1);
glstate.SetColor(1,1,1,1);
assert(blendmode != BLENDMODE::ALPHATEST);
switch (blendmode)
{
case BLENDMODE::DISABLED:
{
glstate.Disable(GL_ALPHA_TEST);
glstate.Disable(GL_BLEND);
glstate.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
}
break;
case BLENDMODE::ADD:
{
glstate.Disable(GL_ALPHA_TEST);
glstate.Enable(GL_BLEND);
glstate.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
glstate.SetBlendFunc(GL_ONE, GL_ONE);
}
break;
case BLENDMODE::ALPHABLEND:
{
glstate.Disable(GL_ALPHA_TEST);
glstate.Enable(GL_BLEND);
glstate.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
glstate.SetBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
break;
case BLENDMODE::PREMULTIPLIED_ALPHA:
{
glstate.Disable(GL_ALPHA_TEST);
glstate.Enable(GL_BLEND);
glstate.Disable(GL_SAMPLE_ALPHA_TO_COVERAGE);
glstate.SetBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
break;
default:
assert(0);
break;
}
if (writedepth || depth_mode != GL_ALWAYS)
glstate.Enable(GL_DEPTH_TEST);
else
glstate.Disable(GL_DEPTH_TEST);
glDepthFunc( depth_mode );
glstate.Enable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);
OPENGL_UTILITY::CheckForOpenGLErrors("postprocess flag set", error_output);
// put the camera transform into texture3
glActiveTexture(GL_TEXTURE3);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
float temp_matrix[16];
(cam_rotation).GetMatrix4(temp_matrix);
glLoadMatrixf(temp_matrix);
glTranslatef(-cam_position[0],-cam_position[1],-cam_position[2]);
glActiveTexture(GL_TEXTURE0);
glMatrixMode(GL_MODELVIEW);
//std::cout << "postprocess: " << std::endl;
PushShadowMatrices();
OPENGL_UTILITY::CheckForOpenGLErrors("shader parameter upload", error_output);
float maxu = 1.f;
float maxv = 1.f;
int num_nonnull = 0;
for (unsigned int i = 0; i < source_textures.size(); i++)
{
//std::cout << i << ": " << source_textures[i] << std::endl;
glActiveTexture(GL_TEXTURE0+i);
if (source_textures[i])
{
source_textures[i]->Activate();
num_nonnull++;
if (source_textures[i]->IsRect())
{
maxu = source_textures[i]->GetW();
maxv = source_textures[i]->GetH();
}
}
}
if (num_nonnull <= 0)
{
error_output << "Out of the " << source_textures.size() << " input textures provided as inputs to this postprocess stage, zero are available. This stage will have no effect." << std::endl;
return;
}
glActiveTexture(GL_TEXTURE0);
OPENGL_UTILITY::CheckForOpenGLErrors("postprocess texture set", error_output);
// build the frustum corners
float ratio = w/h;
std::vector <MATHVECTOR <float, 3> > frustum_corners(4);
frustum_corners[0].Set(-lod_far,-lod_far,-lod_far); //BL
frustum_corners[1].Set(lod_far,-lod_far,-lod_far); //BR
frustum_corners[2].Set(lod_far,lod_far,-lod_far); //TR
frustum_corners[3].Set(-lod_far,lod_far,-lod_far); //TL
MATRIX4 <float> invproj;
invproj.InvPerspective(camfov, ratio, 0.1, lod_far);
for (int i = 0; i < 4; i++)
{
invproj.TransformVectorOut(frustum_corners[i][0], frustum_corners[i][1], frustum_corners[i][2]);
frustum_corners[i][2] = -lod_far;
}
// send shader parameters
{
MATHVECTOR <float, 3> lightvec = lightposition;
cam_rotation.RotateVector(lightvec);
shader->UploadActiveShaderParameter3f("directlight_eyespace_direction", lightvec);
shader->UploadActiveShaderParameter1f("contrast", contrast);
shader->UploadActiveShaderParameter1f("znear", 0.1);
//std::cout << lightvec << std::endl;
shader->UploadActiveShaderParameter3f("frustum_corner_bl", frustum_corners[0]);
shader->UploadActiveShaderParameter3f("frustum_corner_br_delta", frustum_corners[1]-frustum_corners[0]);
shader->UploadActiveShaderParameter3f("frustum_corner_tl_delta", frustum_corners[3]-frustum_corners[0]);
}
glBegin(GL_QUADS);
// send the UV corners in UV set 0, send the frustum corners in UV set 1
glMultiTexCoord2f(GL_TEXTURE0, 0.0f, 0.0f);
glMultiTexCoord3f(GL_TEXTURE1, frustum_corners[0][0], frustum_corners[0][1], frustum_corners[0][2]);
glVertex3f( 0.0f, 0.0f, 0.0f);
glMultiTexCoord2f(GL_TEXTURE0, maxu, 0.0f);
glMultiTexCoord3f(GL_TEXTURE1, frustum_corners[1][0], frustum_corners[1][1], frustum_corners[1][2]);
glVertex3f( 1.0f, 0.0f, 0.0f);
glMultiTexCoord2f(GL_TEXTURE0, maxu, maxv);
glMultiTexCoord3f(GL_TEXTURE1, frustum_corners[2][0], frustum_corners[2][1], frustum_corners[2][2]);
glVertex3f( 1.0f, 1.0f, 0.0f);
glMultiTexCoord2f(GL_TEXTURE0, 0.0f, maxv);
glMultiTexCoord3f(GL_TEXTURE1, frustum_corners[3][0], frustum_corners[3][1], frustum_corners[3][2]);
glVertex3f( 0.0f, 1.0f, 0.0f);
glEnd();
OPENGL_UTILITY::CheckForOpenGLErrors("postprocess draw", error_output);
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
PopShadowMatrices();
glstate.Enable(GL_DEPTH_TEST);
glstate.Disable(GL_TEXTURE_2D);
for (unsigned int i = 0; i < source_textures.size(); i++)
{
//std::cout << i << ": " << source_textures[i] << std::endl;
glActiveTexture(GL_TEXTURE0+i);
if (source_textures[i])
source_textures[i]->Deactivate();
}
glActiveTexture(GL_TEXTURE0);
OPENGL_UTILITY::CheckForOpenGLErrors("postprocess end", error_output);
}
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);
}
