void Camera::Update()
{
Vector3 f = m_center - m_eye;
//normalize it
//int test = XTOF(f.z);
int mag = sqrtx( (int32)(MULX(f.x,f.x) + (int32)MULX(f.y,f.y) + (int32)MULX(f.z,f.z)) );
int n = DIVX(ITOX(1),mag);
f.x = MULX(f.x,n);
f.y = MULX(f.y,n);
f.z = MULX(f.z,n);
//update direction
m_dir = f;
Vector3 s = f ^ m_up,
u = s ^ f;
int matrix[16] = { s.x, u.x, -f.x, 0,
s.y, u.y, -f.y, 0,
s.z, u.z, -f.z, 0,
0, 0, 0, ITOX(1)
};
glMultMatrixx(matrix);
glTranslatex(-m_eye.x,-m_eye.y,-m_eye.z);
}
void scenegraph::render_node_walk(scenenode *node, int depth)
{
#ifdef _EE
ps2_renderer::get()->push_matrix();
ps2_renderer::get()->mult_matrix(node->m_tx.arr());
#else
glPushMatrix();
glMultMatrixx((GLfixed*)&node->m_tx.m[0][0]);
// glMultMatrixf(&node->m_tx.m[0][0]);
#endif
#ifndef _EE
// glDisable(GL_LIGHTING);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
// global render hints settings
if (node->m_hints&HINT_UNLIT) glDisable(GL_LIGHTING);
else glEnable(GL_LIGHTING);
// not supported on gles
//glLineWidth(node->m_line_width);
//glPointSize(node->m_line_width); // ok to share this??
if (node->m_hints&HINT_NOZWRITE) glDepthMask(false);
else glDepthMask(true);
if (node->m_hints&HINT_IGNORE_DEPTH) glDisable(GL_DEPTH_TEST);
else glEnable(GL_DEPTH_TEST);
glEnable(GL_NORMALIZE);
#endif
if (node->m_texture!=0)
{
glEnable(GL_TEXTURE_2D);
m_texture_manager.apply(node->m_texture);
}
else glDisable(GL_TEXTURE_2D);
if (node->m_primitive!=NULL)
{
node->m_primitive->render(node->m_hints);
}
depth++;
scenenode *n=static_cast<scenenode*>(node->m_children.m_head);
while (n!=NULL)
{
render_node_walk(n,depth);
n=static_cast<scenenode*>(n->m_next);
}
#ifdef _EE
ps2_renderer::get()->pop_matrix();
#else
glPopMatrix();
#endif
}
void jellyfish_primitive::render(u32 hints)
{
execute();
vec3 t=m_machine->peek(REG_TX_TRANSLATE);
m_internal_tx.m[3][0]=t.x;
m_internal_tx.m[3][1]=t.y;
m_internal_tx.m[3][2]=t.z;
t=m_machine->peek(REG_TX_ROTATEA);
m_internal_tx.m[0][0]=t.x;
m_internal_tx.m[0][1]=t.y;
m_internal_tx.m[0][2]=t.z;
t=m_machine->peek(REG_TX_ROTATEB);
m_internal_tx.m[1][0]=t.x;
m_internal_tx.m[1][1]=t.y;
m_internal_tx.m[1][2]=t.z;
t=m_machine->peek(REG_TX_ROTATEC);
m_internal_tx.m[2][0]=t.x;
m_internal_tx.m[2][1]=t.y;
m_internal_tx.m[2][2]=t.z;
// wheee!
glMultMatrixx((GLfixed*)&m_internal_tx.m[0][0]);
switch (m_machine->peekiy(REG_GRAPHICS))
{
case TRIANGLES: m_type=GL_TRIANGLES; break;
case TRISTRIP: m_type=GL_TRIANGLE_STRIP; break;
case POINTS: m_type=GL_POINTS; break;
case LINES: m_type=GL_LINES; break;
case LINESTRIP: m_type=GL_LINE_STRIP; break;
default: m_type=GL_TRIANGLES;
}
u32 size=m_size;
m_size=m_machine->peekix(REG_GRAPHICS);
hints=m_machine->peekiz(REG_GRAPHICS);
primitive::render(hints);
m_size=size;
}
/* Following gluLookAt implementation is adapted from the
* Mesa 3D Graphics library. http://www.mesa3d.org
*/
static void gluLookAt(GLfloat eyex, GLfloat eyey, GLfloat eyez,
GLfloat centerx, GLfloat centery, GLfloat centerz,
GLfloat upx, GLfloat upy, GLfloat upz)
{
GLfloat m[16];
GLfloat x[3], y[3], z[3];
GLfloat mag;
/* Make rotation matrix */
/* Z vector */
z[0] = eyex - centerx;
z[1] = eyey - centery;
z[2] = eyez - centerz;
mag = (float)sqrt(z[0] * z[0] + z[1] * z[1] + z[2] * z[2]);
if (mag) { /* mpichler, 19950515 */
z[0] /= mag;
z[1] /= mag;
z[2] /= mag;
}
/* Y vector */
y[0] = upx;
y[1] = upy;
y[2] = upz;
/* X vector = Y cross Z */
x[0] = y[1] * z[2] - y[2] * z[1];
x[1] = -y[0] * z[2] + y[2] * z[0];
x[2] = y[0] * z[1] - y[1] * z[0];
/* Recompute Y = Z cross X */
y[0] = z[1] * x[2] - z[2] * x[1];
y[1] = -z[0] * x[2] + z[2] * x[0];
y[2] = z[0] * x[1] - z[1] * x[0];
/* mpichler, 19950515 */
/* cross product gives area of parallelogram, which is < 1.0 for
* non-perpendicular unit-length vectors; so normalize x, y here
*/
mag = (float)sqrt(x[0] * x[0] + x[1] * x[1] + x[2] * x[2]);
if (mag) {
x[0] /= mag;
x[1] /= mag;
x[2] /= mag;
}
mag = (float)sqrt(y[0] * y[0] + y[1] * y[1] + y[2] * y[2]);
if (mag) {
y[0] /= mag;
y[1] /= mag;
y[2] /= mag;
}
#define M(row,col) m[(col)*4+(row)]
M(0, 0) = x[0];
M(0, 1) = x[1];
M(0, 2) = x[2];
M(0, 3) = 0.0;
M(1, 0) = y[0];
M(1, 1) = y[1];
M(1, 2) = y[2];
M(1, 3) = 0.0;
M(2, 0) = z[0];
M(2, 1) = z[1];
M(2, 2) = z[2];
M(2, 3) = 0.0;
M(3, 0) = 0.0;
M(3, 1) = 0.0;
M(3, 2) = 0.0;
M(3, 3) = 1.0;
#undef M
{
int a;
GLfixed fixedM[16];
for (a = 0; a < 16; ++a)
fixedM[a] = (GLfixed)(m[a] * 65536);
glMultMatrixx(fixedM);
}
/* Translate Eye to Origin */
glTranslatex((GLfixed)(-eyex * 65536),
(GLfixed)(-eyey * 65536),
(GLfixed)(-eyez * 65536));
}
void glMultMatrixxLogged(const GLfixed *m) {
printf("glMultMatrixx(%p)\n", m);
glMultMatrixx(m);
}
static void gluLookAt(GLfloat eyex, GLfloat eyey, GLfloat eyez,
GLfloat centerx, GLfloat centery, GLfloat centerz,
GLfloat upx, GLfloat upy, GLfloat upz)
{
GLfloat m[16];
GLfloat x[3], y[3], z[3];
GLfloat mag;
z[0] = eyex - centerx;
z[1] = eyey - centery;
z[2] = eyez - centerz;
mag = (float)sqrt(z[0] * z[0] + z[1] * z[1] + z[2] * z[2]);
if (mag) {
z[0] /= mag;
z[1] /= mag;
z[2] /= mag;
}
y[0] = upx;
y[1] = upy;
y[2] = upz;
x[0] = y[1] * z[2] - y[2] * z[1];
x[1] = -y[0] * z[2] + y[2] * z[0];
x[2] = y[0] * z[1] - y[1] * z[0];
y[0] = z[1] * x[2] - z[2] * x[1];
y[1] = -z[0] * x[2] + z[2] * x[0];
y[2] = z[0] * x[1] - z[1] * x[0];
mag = (float)sqrt(x[0] * x[0] + x[1] * x[1] + x[2] * x[2]);
if (mag) {
x[0] /= mag;
x[1] /= mag;
x[2] /= mag;
}
mag = (float)sqrt(y[0] * y[0] + y[1] * y[1] + y[2] * y[2]);
if (mag) {
y[0] /= mag;
y[1] /= mag;
y[2] /= mag;
}
#define M(row,col) m[col*4+row]
M(0, 0) = x[0];
M(0, 1) = x[1];
M(0, 2) = x[2];
M(0, 3) = 0.0;
M(1, 0) = y[0];
M(1, 1) = y[1];
M(1, 2) = y[2];
M(1, 3) = 0.0;
M(2, 0) = z[0];
M(2, 1) = z[1];
M(2, 2) = z[2];
M(2, 3) = 0.0;
M(3, 0) = 0.0;
M(3, 1) = 0.0;
M(3, 2) = 0.0;
M(3, 3) = 1.0;
#undef M
{
int a;
GLfixed fixedM[16];
for (a = 0; a < 16; ++a)
fixedM[a] = (GLfixed)(m[a] * 65536);
glMultMatrixx(fixedM);
}
glTranslatex((GLfixed)(-eyex * 65536),
(GLfixed)(-eyey * 65536),
(GLfixed)(-eyez * 65536));
}