void Camera::centerOn(float center[4], float halfDists[4])
{
vec4fCopy(m_o, center);
m_radius = vec3fNorm(halfDists) * 2.f;
if (m_far < m_radius)
{
m_far = 1.5 * m_radius;
setPerspective(m_near, m_far, m_fov, m_ratio);
}
}
Camera::Camera() :
m_phi(3.14/2.f),
m_theta(3.14/2.f),
m_radius(10.f),
m_near(0.1f),
m_far(1000.f),
m_fov(60)
{
vec4fCopy(m_o, NULLVEC4f);
worldToView();
}
void meshDraw(Mesh *m)
{
struct GsState *g = gsCurState;
int i, j;
Vector4f vf;
Vector4f n;
Vector4f lightdir = {1.0f, 1.0f, 1.0f };
float intens;
uint32 vi[3];
uint8 c[4];
int blockCount;
int vertexCount;
int blockVertCount;
int vertexOffset;
uint64 regs, numRegs;
uint64 prim;
int ind;
vec3fNormalize(lightdir);
if (m->attribs & MESHATTR_INDEXED)
vertexCount = m->indexCount;
else
vertexCount = m->vertexCount;
blockCount = vertexCount/39 + ((vertexCount%39) ? 1 : 0);
regs = 0x5; // XYZ
numRegs = 1;
if (m->attribs & MESHATTR_COLORS || m->attribs & MESHATTR_NORMALS) {
regs = (regs << 4) | 0x1; // RGBAQ
numRegs++;
}
// TODO: texcoords and normals
prim = MAKE_GS_PRIM(m->primitive,IIP_GOURAUD,0,0,0,0,0,0,0);
vertexOffset = 0;
for (i = 0; i < blockCount; i++) {
blockVertCount = 39;
if (i == blockCount-1) {
blockVertCount = vertexCount % 39;
if (blockVertCount == 0)
blockVertCount = 39;
}
if (m->primitive == PRIM_TRI_STRIP && vertexOffset > 0) {
vertexOffset -= 2;
blockVertCount += 2;
}
GIF_BEGIN_PACKET(meshGifBuf);
GIF_TAG(meshGifBuf,blockVertCount,1,1,prim,0,numRegs,regs);
for (j = 0; j < blockVertCount; j++) {
if (m->attribs & MESHATTR_INDEXED)
ind = m->indices[j + vertexOffset];
else
ind = j + vertexOffset;
vec4fCopy(vf, m->vertices[ind]);
vf[3] = 1.0f;
matMultVec(mathModelViewMat, vf);
matMultVec(mathProjectionMat, vf);
vf[0] /= vf[3];
vf[1] /= vf[3];
vf[2] /= vf[3];
gsNormalizedToScreen(vf, vi);
vi[0] = ((vi[0]*16) + g->xoff) & 0xFFFF;
vi[1] = ((vi[1]*16) + g->yoff) & 0xFFFF;
if (m->attribs & MESHATTR_COLORS) {
c[0] = m->colors[ind][0];
c[1] = m->colors[ind][1];
c[2] = m->colors[ind][2];
c[3] = m->colors[ind][3];
GIF_DATA_RGBAQ(meshGifBuf,c[0],c[1],c[2],c[3]);
} else if (m->attribs & MESHATTR_NORMALS) {
vec4fCopy(n, m->normals[ind]);
matMultVec(mathNormalMat, n);
vec3fNormalize(n);
intens = vec3fDot(n, lightdir);
intens = intens > 0.0f ? intens : 0.0f;
c[0] = intens * 255.0f;
c[1] = intens * 0.0f;
c[2] = intens * 255.0f;
c[3] = 128.0f;
GIF_DATA_RGBAQ(meshGifBuf,c[0],c[1],c[2],c[3]);
}
GIF_DATA_XYZ2(meshGifBuf,vi[0],vi[1],vi[2],0);
}
GIF_SEND_PACKET(meshGifBuf);
vertexOffset += blockVertCount;
}
}
