void render(NODE * node, Vector camPos)
{
Mtx tmp;
if(!node->isRenderable()) return;//Skip non-renderable nodes such as empty nodes, regions or lights
if(node->flags & F_Visible)//Is it visible?
{
//Set matrices
Mtx aux, inv;
GX_ClearVtxDesc();
node->absMtx(modelM);
char msg[64];
guMtxConcat(view, modelM, modelview);
GX_LoadPosMtxImm(modelview, GX_PNMTX0);//Load model view matrix
guMtxInverse(modelview, tmp);
guMtxTranspose(tmp,inv);
GX_LoadNrmMtxImm(inv, GX_PNMTX0);//Load normal matrix
//TODO: Better lighting (multiple lights)
std::vector<LIGHT*>::iterator light = mainRoot->getLights().begin();
//if(light == mainRoot->getLights().end())
// REVConsole->write("LIGHT");
GXLightObj lObj[8];
u8 lightMask = 0, tmpLight = GX_LIGHT0;
for(u8 i = 0;light != mainRoot->getLights().end(); ++light, ++i)
{
Vector lpos = (*light)->getPos();
guVecMultiply(view, &lpos, &lpos);
GX_InitLightPos(&lObj[i],lpos.x,lpos.y,lpos.z);
GX_InitLightAttn(&lObj[i], 1.0f,0.0f,0.0f,1.0f,0.0f,0.0f);
GX_InitLightSpot(&lObj[i],0.0f,GX_SP_OFF);
GX_InitLightColor(&lObj[i],(*light)->clr);
GX_LoadLightObj(&lObj[i],tmpLight);
lightMask |= tmpLight;
tmpLight *= 2;
}
//Render the node
node->render(lightMask);
}
}
void glEnd(void) {
GX_SetCullMode(GX_CULL_FRONT);
Mtx mvi;
Mtx mv;
// Mtx inversemodelview;
// load the modelview matrix into matrix memory
guMtxConcat(view,model,modelview);
GX_LoadPosMtxImm(modelview, GX_PNMTX0);
//for normals first calculate normal matrix (thanks shagkur)
guMtxInverse(modelview,mvi);
guMtxTranspose(mvi,modelview);
GX_LoadNrmMtxImm(modelview,GX_PNMTX0); //experimtal leave out (hmm works good?)
//use global ambient light together with current material ambient and add emissive material color
GXColor constcolor;
constcolor.r = (gxcurrentmaterialambientcolor.r*gxglobalambientlightcolor.r) * 0xFF;
constcolor.g = (gxcurrentmaterialambientcolor.g*gxglobalambientlightcolor.g) * 0xFF;
constcolor.b = (gxcurrentmaterialambientcolor.b*gxglobalambientlightcolor.b) * 0xFF;
constcolor.a = (gxcurrentmaterialambientcolor.a*gxglobalambientlightcolor.a) * 0xFF;
GX_SetTevColor(GX_TEVREG0, constcolor);
GXColor emiscolor;
emiscolor.r = gxcurrentmaterialemissivecolor.r * 0xFF;
emiscolor.g = gxcurrentmaterialemissivecolor.g * 0xFF;
emiscolor.b = gxcurrentmaterialemissivecolor.b * 0xFF;
emiscolor.a = gxcurrentmaterialemissivecolor.a * 0xFF;
GX_SetTevColor(GX_TEVREG1, emiscolor);
//first check if a lightdirtyflag is set (thanks ector) so we do not have to set up light every run
//also usefull on matrices etc.
//now set each light
GXColor gxchanambient;
gxchanambient.r = gxcurrentmaterialambientcolor.r;
gxchanambient.g = gxcurrentmaterialambientcolor.g;
gxchanambient.b = gxcurrentmaterialambientcolor.b;
gxchanambient.a = gxcurrentmaterialambientcolor.a;
GXColor gxchanspecular;
gxchanspecular.r = gxcurrentmaterialspecularcolor.r;
gxchanspecular.g = gxcurrentmaterialspecularcolor.g;
gxchanspecular.b = gxcurrentmaterialspecularcolor.b;
gxchanspecular.a = gxcurrentmaterialspecularcolor.a;
int lightcounter = 0;
for (lightcounter =0; lightcounter < 4; lightcounter++){
if(gxlightenabled[lightcounter]){ //when light is enabled
//somewhere here an error happens?
//Setup mat/light ambient color
gxchanambient.r = ((gxchanambient.r * gxlightambientcolor[lightcounter].r) * 0xFF);
gxchanambient.g = ((gxchanambient.g * gxlightambientcolor[lightcounter].g) * 0xFF);
gxchanambient.b = ((gxchanambient.b * gxlightambientcolor[lightcounter].b) * 0xFF);
gxchanambient.a = ((gxchanambient.a * gxlightambientcolor[lightcounter].a) * 0xFF);
GX_SetChanAmbColor(GX_COLOR0A0, gxchanambient );
//Setup diffuse material color
GXColor mdc;
mdc.r = (gxcurrentmaterialdiffusecolor.r * 0xFF);
mdc.g = (gxcurrentmaterialdiffusecolor.g * 0xFF);
mdc.b = (gxcurrentmaterialdiffusecolor.b * 0xFF);
mdc.a = (gxcurrentmaterialdiffusecolor.a * 0xFF);
GX_SetChanMatColor(GX_COLOR0A0, mdc );
//Setup specular material color
// gxcurrentmaterialshininess *
gxchanspecular.r = (gxchanspecular.r * gxlightspecularcolor[lightcounter].r) * 0xFF;
gxchanspecular.g = (gxchanspecular.g * gxlightspecularcolor[lightcounter].g) * 0xFF;
gxchanspecular.b = (gxchanspecular.b * gxlightspecularcolor[lightcounter].b) * 0xFF;
gxchanspecular.a = (gxchanspecular.a * gxlightspecularcolor[lightcounter].a) * 0xFF;
GX_SetChanMatColor(GX_COLOR1A1, gxchanspecular); // use red as test color
//Setup light diffuse color
GXColor ldc;
ldc.r = gxlightdiffusecolor[lightcounter].r * 0xFF;
ldc.g = gxlightdiffusecolor[lightcounter].g * 0xFF;
ldc.b = gxlightdiffusecolor[lightcounter].b * 0xFF;
ldc.a = gxlightdiffusecolor[lightcounter].a * 0xFF;
GX_InitLightColor(&gxlight[lightcounter], ldc ); //move call to glend or init?;
GX_InitLightColor(&gxlight[lightcounter+4], ldc ); //move call to glend or init?;
//Setup light postion
//check on w component when 1. light is positional
// when 0. light is directional at infinite pos
guVector lpos;
guVector wpos;
lpos.x = gxlightpos[lightcounter].x;
lpos.y = gxlightpos[lightcounter].y;
lpos.z = gxlightpos[lightcounter].z;
if (gxlightpos[lightcounter].w == 0){
guVecNormalize(&lpos);
lpos.x *= BIG_NUMBER;
lpos.y *= BIG_NUMBER;
lpos.z *= BIG_NUMBER;
}
guVecMultiply(view,&lpos,&wpos); //light position should be transformed by world-to-view matrix (thanks h0lyRS)
GX_InitLightPosv(&gxlight[lightcounter], &wpos); //feed corrected coord to light pos
GX_InitLightPosv(&gxlight[lightcounter+4], &wpos); //feed corrected coord to light pos
//Setup light direction (when w is 1 dan dir = 0,0,0
guVector ldir;
if (gxlightpos[lightcounter].w==0){
//lpos.x = gxlightpos[lightcounter].x;
//lpos.y = gxlightpos[lightcounter].y;
//lpos.z = gxlightpos[lightcounter].z;
ldir.x = gxlightpos[lightcounter].x;
ldir.y = gxlightpos[lightcounter].y;
ldir.z = gxlightpos[lightcounter].z;
}
else
{
if (gxspotcutoff[lightcounter] != 180){ //if we have a spot light direction is needed
ldir.x = gxspotdirection[lightcounter].x;
ldir.y = gxspotdirection[lightcounter].y;
ldir.z = gxspotdirection[lightcounter].z;
}
else {
ldir.x = 0;
ldir.y = 0;
ldir.z = -1;
}
}
//guVecNormalize(&ldir);
//ldir.x *= BIG_NUMBER;
//ldir.y *= BIG_NUMBER;
//ldir.z *= BIG_NUMBER;
guMtxInverse(view,mvi);
guMtxTranspose(mvi,view);
guVecMultiply(view,&ldir,&ldir); //and direction should be transformed by inv-transposed of world-to-view (thanks h0lyRS)
GX_InitLightDir(&gxlight[lightcounter], ldir.x, ldir.y, ldir.z); //feed corrected coord to light dir
GX_InitLightDir(&gxlight[lightcounter+4], ldir.x, ldir.y, ldir.z); //feed corrected coord to light dir
if (gxspotcutoff[lightcounter] != 180){
//Setup specular light (only for spotlight when GL_SPOT_CUTOFF <> 180)
//make this line optional? If on it disturbs diffuse light?
guVector sdir;
sdir.x = gxspotdirection[lightcounter].x;
sdir.y = gxspotdirection[lightcounter].y;
sdir.z = gxspotdirection[lightcounter].z;
//guVecNormalize(&sdir);
//sdir.x *= BIG_NUMBER;
//sdir.y *= BIG_NUMBER;
//sdir.z *= BIG_NUMBER;
guVecMultiply(view,&sdir,&sdir);
guVector light_dir;
guVecSub(&sdir, &lpos, &light_dir);
GX_TestInitSpecularDir(&gxlight[lightcounter], light_dir.x, light_dir.y, light_dir.z); //needed to enable specular light
GX_TestInitSpecularDir(&gxlight[lightcounter+4], light_dir.x, light_dir.y, light_dir.z); //needed to enable specular light
};
//this calls:
// #define GX_InitLightShininess(lobj, shininess) (GX_InitLightAttn(lobj, 0.0F, 0.0F, 1.0F, (shininess)/2.0F, 0.0F, 1.0F-(shininess)/2.0F ))
//Setup distance attinuation (opengl vs gx differences?)
//GX_InitLightDistAttn(&gxlight[lightcounter], 100.0f, gxspotexponent[lightcounter], GX_DA_GENTLE); //gxspotexponent was 0.5f
//ref_dist, bright, dist func
//k0 = 1.0;
//k1 = 0.5f*(1.0f-ref_brite)/(ref_brite*ref_dist);
//k2 = 0.5f*(1.0f-ref_brite)/(ref_brite*ref_dist*ref_dist); or 0.0f;
//Attenuation factor = 1 / (kc + kl*d + kq*d2)
//kc = constant attenuation factor (default = 1.0)
//kl = linear attenuation factor (default = 0.0)
//kq = quadratic attenuation factor (default = 0.0)
float distance = BIG_NUMBER; //either distance of light or falloff factor
float factor = 1 / (gxconstantattanuation[lightcounter] + gxlinearattanuation[lightcounter]*distance + gxquadraticattanuation[lightcounter]*distance*distance);
//float factor = 5.0;
//k0 - 0;
//k1 = 0.5f*(1.0f-ref_brite)/(ref_brite*ref_dist);
//k2 = 0.5f*(1.0f-ref_brite)/(ref_brite*ref_dist*ref_dist);
/*
GX_InitLightAttn(&gxlight[lightcounter],
1.0, //filled by initlightspot
0.0, //filled by initlightspot
0.0, //filled by initlightspot
gxconstantattanuation[lightcounter],
gxlinearattanuation[lightcounter]*distance,
gxquadraticattanuation[lightcounter]*distance*distance
) ;
// k0 k1 , k2
*/
//GX_InitLightAttnK(&gxlight[lightcounter], (gxcurrentmaterialshininess)/2.0F , 0.0F ,1.0F-(gxcurrentmaterialshininess)/2.0F);
GX_InitLightDistAttn(&gxlight[lightcounter], factor ,1.0, GX_DA_STEEP); //gxspotexponent[lightcounter] GX_DA_GENTLE
GX_InitLightDistAttn(&gxlight[lightcounter+4], factor ,1.0, GX_DA_STEEP); //gxspotexponent[lightcounter] GX_DA_GENTLE
//ref_dist //ref_brite
// factor / strenght
//1.0 is // glLightf(GL_LIGHT1, GL_SPOT_EXPONENT, 10.0f); ??
//Setup light type (normal/spotlight)
//0-90 / 255-0
//cut_off, spot func
//GX_InitLightSpot(&gxlight[lightcounter], 0.0f, GX_SP_OFF); //not this is not a spot light
//GX_InitLightShininess(&gxlight[lightcounter], gxcurrentmaterialshininess); // /180?
//float testspot = 90 - ((gxcurrentmaterialshininess * 90) / 128); //thanks ector 90 - (x * 90 / 255)
//if (gxcurrentmaterialshininess == 0){
// testspot = 90;
//}
//zid 255-gxcurrentmaterialshininess/(255/90);
//setup specular highlight
//GX_InitLightSpot(&gxlight[lightcounter], testspot, GX_SP_COS); //not this is not a spot light (gxspotcutoff[lightcounter])
//setup normal spotlight
GX_InitLightSpot(&gxlight[lightcounter], gxspotcutoff[lightcounter], GX_SP_RING1); //not this is not a spot light ()
GX_InitLightSpot(&gxlight[1], gxspotcutoff[lightcounter], GX_SP_RING1); //not this is not a spot light ()
if ( gxcurrentmaterialshininess != 0 ) {
//if (gxspotcutoff[lightcounter] != 180) {
GX_TestInitLightShininess(&gxlight[lightcounter+4], gxcurrentmaterialshininess);
//}
};
//Load the light up
switch (lightcounter){
case 0:
GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT0);
GX_LoadLightObj(&gxlight[lightcounter+4], GX_LIGHT4);
break;
case 1:
GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT1);
GX_LoadLightObj(&gxlight[lightcounter+4], GX_LIGHT5);
break;
case 2:
GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT2);
GX_LoadLightObj(&gxlight[lightcounter+4], GX_LIGHT6);
break;
case 3:
GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT3);
GX_LoadLightObj(&gxlight[lightcounter+4], GX_LIGHT7);
break;
// case 4: GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT4); break;
// case 5: GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT5); break;
// case 6: GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT6); break;
// case 7: GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT7); break;
}
//GX_LoadLightObj(&gxlight[lightcounter], GX_LIGHT0);
//GX_LoadLightObj(&gxlight[1], GX_LIGHT1);
}
}
//set the curtexture if tex2denabled
if (tex2denabled){
GX_LoadTexObj(&gxtextures[curtexture], GX_TEXMAP0); //TODO: make GX_TEXMAP0 dynamic for multitexturing
};
//now we can draw the gx way (experiment try render in reverse ivm normals pointing the wrong way)
int countelements = _numelements*2;
if (gxcullfaceanabled==true){
countelements = _numelements;
}
GX_Begin(_type, GX_VTXFMT0, countelements); //dependend on culling setting
int i =0;
//default
//order dependend on glFrontFace(GL_CCW);
//or GL_CW // for( i=0; i<_numelements; i++)
//GX_TRIANGLESTRIP GL_TRIANGLE_STRIP
//0 1 2 0 1 2
//1 3 2 2 1 3
//2 3 4 2 3 4
//better think of a clever swapping routine
//maybe then no need to invert normal for trianglestrip anymore
//also GX_TRIANLES need to be drawn in reverse?
//but GX_QUAD does not
//so GX = CW by default while opengl is CCW by default?
//bushing say cannot i be possibel that opengl reorders vertexes
//u32 reverse = 0;
//int pos = 0;
//int temp = 0;
//GL_POLYGON: http://www.gamedev.net/reference/articles/article425.asp
bool cw = true;
bool ccw = true;
if(gxcullfaceanabled==true){
cw = false;
ccw = false;
switch(gxwinding){
case GL_CW: cw = true; break;
case GL_CCW: ccw = true; break;
}
}
if (cw==true){
//CW
for( i=_numelements-1; i>=0; i--)
{
UploadVertex(i);
}
}
if (ccw==true){
//CCW
for( i=0; i<_numelements; i++)
{
UploadVertex(i);
}
}
GX_End();
//clean up just to be sure
i =0;
for( i=0; i<_numelements; i++)
{
_vertexelements[i].x = 0.0F;
_vertexelements[i].y = 0.0F;
_vertexelements[i].z = 0.0F;
_normalelements[i].x = 0.0F;
_normalelements[i].y = 0.0F;
_normalelements[i].z = 0.0F;
_colorelements[i].r = 0.0F;
_colorelements[i].g = 0.0F;
_colorelements[i].b = 0.0F;
_colorelements[i].a = 0.0F;
_texcoordelements[i].s = 0.0F;
_texcoordelements[i].t = 0.0F;
}
_numelements =0;
}
bool TestOBBOBB(OBB& a, OBB& b) {
f32 ra, rb;
Mtx R, AbsR;
// Compute rotation matrix expressing b in a's coordinate frame
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
//R[i][j] = dot(&a.u[i], &b.u[j]);
R[j][i] = dot(&a.u[i], &b.u[j]);
for (int i = 0; i < 3; i++) {
//R[i][0] = a.u[i].x * b.u[0].x + a.u[i].y * b.u[1].x + a.u[i].z * b.u[2].x;
//R[i][1] = a.u[i].x * b.u[0].y + a.u[i].y * b.u[1].y + a.u[i].z * b.u[2].y;
//R[i][2] = a.u[i].x * b.u[0].z + a.u[i].y * b.u[1].z + a.u[i].z * b.u[2].z;
//R[i][0] = b.u[i].x * a.u[0].x + b.u[i].y * a.u[1].x + b.u[i].z * a.u[2].x;
//R[i][1] = b.u[i].x * a.u[0].y + b.u[i].y * a.u[1].y + b.u[i].z * a.u[2].y;
//R[i][2] = b.u[i].x * a.u[0].z + b.u[i].y * a.u[1].z + b.u[i].z * a.u[2].z;
}
SYS_LOG(L"R={ %.3f, %.3f, %.3f", R[0][0], R[0][1], R[0][2]);
SYS_LOG(L" %.3f, %.3f, %.3f", R[1][0], R[1][1], R[1][2]);
SYS_LOG(L" %.3f, %.3f, %.3f}", R[2][0], R[2][1], R[2][2]);
guMtxTranspose(R, R);
// Compute translation vector t
//Vector t = b.c - a.c;
Vec _t;
_t.x = b.c.x - a.c.x;
_t.y = b.c.y - a.c.y;
_t.z = b.c.z - a.c.z;
// Bring translation into a's coordinate frame
f32 t[3];
t[0] = _t.x*a.u[0].x + _t.y*a.u[0].y + _t.z*a.u[0].z;
t[1] = _t.x*a.u[1].x + _t.y*a.u[1].y + _t.z*a.u[1].z;
t[2] = _t.x*a.u[2].x + _t.y*a.u[2].y + _t.z*a.u[2].z;
// Compute common subexpressions. Add in an epsilon term to counteract arithmetic errors when two edges are parallel and
// their cross product is (near) null (see text for details)
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
AbsR[i][j] = fabs(R[i][j]) + EPSILON;
SYS_LOG(L"abs(R)={ %.3f, %.3f, %.3f", AbsR[0][0], AbsR[0][1], AbsR[0][2]);
SYS_LOG(L" %.3f, %.3f, %.3f", AbsR[1][0], AbsR[1][1], AbsR[1][2]);
SYS_LOG(L" %.3f, %.3f, %.3f}", AbsR[2][0], AbsR[2][1], AbsR[2][2]);
// Test axes L = A0, L = A1, L = A2
for (int i = 0; i < 3; i++) {
ra = a.e[i];
rb = b.e[0] * AbsR[i][0] + b.e[1] * AbsR[i][1] + b.e[2] * AbsR[i][2];
SYS_LOG(L":A%i, t={%.3f, %.3f, %.3f}, ra=%.3f, rb=%.3f", i, t[0], t[1], t[2], ra, rb);
if (fabs(t[i]) > ra + rb) return 0;
}
// Test axes L = B0, L = B1, L = B2
for (int i = 0; i < 3; i++) {
ra = a.e[0] * AbsR[0][i] + a.e[1] * AbsR[1][i] + a.e[2] * AbsR[2][i];
rb = b.e[i];
SYS_LOG(L":B%i", i);
if (fabs(t[0] * R[0][i] + t[1] * R[1][i] + t[2] * R[2][i]) > ra + rb) return 0;
}
// Test axis L = A0 x B0
SYS_LOG(L":A0 x B0");
ra = a.e[1] * AbsR[2][0] + a.e[2] * AbsR[1][0];
rb = b.e[1] * AbsR[0][2] + b.e[2] * AbsR[0][1];
if (fabs(t[2] * R[1][0] - t[1] * R[2][0]) > ra + rb) return 0;
// Test axis L = A0 x B1
SYS_LOG(L":A0 x B1");
ra = a.e[1] * AbsR[2][1] + a.e[2] * AbsR[1][1];
rb = b.e[0] * AbsR[0][2] + b.e[2] * AbsR[0][0];
if (fabs(t[2] * R[1][1] - t[1] * R[2][1]) > ra + rb) return 0;
// Test axis L = A0 x B2
SYS_LOG(L":A0 x B2");
ra = a.e[1] * AbsR[2][2] + a.e[2] * AbsR[1][2];
rb = b.e[0] * AbsR[0][1] + b.e[1] * AbsR[0][0];
if (fabs(t[2] * R[1][2] - t[1] * R[2][2]) > ra + rb) return 0;
// Test axis L = A1 x B0
SYS_LOG(L":A1 x B0");
ra = a.e[0] * AbsR[2][0] + a.e[2] * AbsR[0][0];
rb = b.e[1] * AbsR[1][2] + b.e[2] * AbsR[1][1];
if (fabs(t[0] * R[2][0] - t[2] * R[0][0]) > ra + rb) return 0;
// Test axis L = A1 x B1
SYS_LOG(L":A1 x B1");
ra = a.e[0] * AbsR[2][1] + a.e[2] * AbsR[0][1];
rb = b.e[0] * AbsR[1][2] + b.e[2] * AbsR[1][0];
if (fabs(t[0] * R[2][1] - t[2] * R[0][1]) > ra + rb) return 0;
// Test axis L = A1 x B2
SYS_LOG(L":A1 x B2");
ra = a.e[0] * AbsR[2][2] + a.e[2] * AbsR[0][2];
rb = b.e[0] * AbsR[1][1] + b.e[1] * AbsR[1][0];
if (fabs(t[0] * R[2][2] - t[2] * R[0][2]) > ra + rb) return 0;
// Test axis L = A2 x B0
SYS_LOG(L":A2 x B0");
ra = a.e[0] * AbsR[1][0] + a.e[1] * AbsR[0][0];
rb = b.e[1] * AbsR[2][2] + b.e[2] * AbsR[2][1];
if (fabs(t[1] * R[0][0] - t[0] * R[1][0]) > ra + rb) return 0;
// Test axis L = A2 x B1
SYS_LOG(L":A2 x B1");
ra = a.e[0] * AbsR[1][1] + a.e[1] * AbsR[0][1];
rb = b.e[0] * AbsR[2][2] + b.e[2] * AbsR[2][0];
if (fabs(t[1] * R[0][1] - t[0] * R[1][1]) > ra + rb) return 0;
// Test axis L = A2 x B2
SYS_LOG(L":A2 x B2");
ra = a.e[0] * AbsR[1][2] + a.e[1] * AbsR[0][2];
rb = b.e[0] * AbsR[2][1] + b.e[1] * AbsR[2][0];
if (fabs(t[1] * R[0][2] - t[0] * R[1][2]) > ra + rb) return 0;
// Since no separating axis found, the OBBs must be intersecting
SYS_LOG(L":INTERSECTION");
return 1;
}
void Particle_Render(Mtx M_view, ParticleSystem* psystem, Camera* camera) {
// setup TEV
GX_ClearVtxDesc();
GX_SetVtxDesc(GX_VA_POS, GX_DIRECT);
GX_SetVtxDesc(GX_VA_CLR0, GX_DIRECT);
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
GX_SetVtxAttrFmt(GX_VTXFMT6, GX_VA_POS, GX_POS_XYZ, GX_F32, 0);
GX_SetVtxAttrFmt(GX_VTXFMT6, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0);
GX_SetVtxAttrFmt(GX_VTXFMT6, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
// load model-view matrix
Mtx M_modelView;
guMtxIdentity(M_modelView);
GX_LoadPosMtxImm(M_modelView, GX_PNMTX0);
// setup tev
GX_SetBlendMode(GX_BM_BLEND, GX_BL_SRCALPHA, GX_BL_INVSRCALPHA, GX_LO_CLEAR);
GX_SetAlphaUpdate(GX_TRUE);
GX_SetNumChans(1);
GX_SetTevColorIn(
GX_TEVSTAGE0,
GX_CC_TEXC, // a
GX_CC_RASC, // b
GX_CC_TEXA, // c
GX_CC_ZERO); // d
GX_SetTevColorOp(
GX_TEVSTAGE0, // stage
GX_TEV_ADD, // op
GX_TB_ZERO, // bias
GX_CS_SCALE_2, // scale
GX_ENABLE, // clamp 0-255
GX_TEVPREV); // output reg
GX_SetTevAlphaIn(
GX_TEVSTAGE0,
GX_CA_ZERO, // a
GX_CA_TEXA, // b
GX_CA_RASA, // c
GX_CA_ZERO); // d
GX_SetTevAlphaOp(
GX_TEVSTAGE0, // stage
GX_TEV_ADD, // op
GX_TB_ZERO, // bias
GX_CS_SCALE_1, // scale
GX_ENABLE, // clamp 0-255
GX_TEVPREV); // output reg
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
GX_SetNumTexGens(1);
GX_SetTexCoordGen(GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);
GX_LoadTexObj(&psystem->texture, GX_TEXMAP0);
int n = psystem->n_particles;
f32 texCoords[] = {
0, 0,
0, 1,
1, 1,
1, 0
};
GX_InvVtxCache();
Vec3 camPos = camera->position();
Mtx axisMtx;
System::LogClear();
Particle_Sort(M_view, psystem);
GX_Begin(GX_QUADS, GX_VTXFMT6, n*4);
for (int k = 0; k < n; k++) {
int i = psystem->binsAllocations[k].particleIdx;
//System::Log(L"p%d", i);
Vec3& p = psystem->positions[i];
f32 lifetime = psystem->lifetimes[i];
f32 age = psystem->ages[i];
f32 ratio = age/lifetime;
Vec3 forward = Math3D::normalized(camPos - p);
Vec3 worldUp = Vec3(0, 1, 0);
Vec3 right = Math3D::normalized(Math3D::cross(worldUp, forward));
Vec3 up = Math3D::cross(forward, right);
Mtx pm;
guMtxCopy(M_view, pm);
guMtxTranspose(pm, pm);
pm[0][3] = p.x; pm[1][3] = p.y; pm[2][3] = p.z;
guMtxConcat(M_view, pm, pm);
f32 rotation = psystem->rotations[i];
if (psystem->rotationInterpolator)
rotation = psystem->rotationInterpolator->getValue(rotation, ratio);
f32 size = psystem->sizes[i];
if (psystem->sizeInterpolator)
size = psystem->sizeInterpolator->getValue(size, ratio);
if (psystem->colorInterpolator)
psystem->colors[i] = psystem->colorInterpolator->getValue(ratio);
Matrix34 M_rot = Math3D::matrixRotationZ(rotation);
f32 hs = size*0.5f;
Vec3 p0(-hs, +hs, 0);
Vec3 p1(-hs, -hs, 0);
Vec3 p2(+hs, -hs, 0);
Vec3 p3(+hs, +hs, 0);
Vec3 vs[4] = {p0, p1, p2, p3};
for (int i = 0; i < 4; i++) {
vs[i] = M_rot * vs[i];
vs[i] = Math3D::matrixVecMul(pm, vs[i]);
}
for (int i = 0; i < 4; i++) {
f32* coords = &texCoords[2*i];
SendVertex(vs[i], psystem->colors[i], coords[0], coords[1]);
}
}
GX_End();
return;
}