void CMaterialViewer::Draw2D()
{
guard(CMaterialViewer::Draw2D);
CObjectViewer::Draw2D();
if (IsTexture && ShowChannels)
{
UUnrealMaterial *Mat = static_cast<UUnrealMaterial*>(Object);
Mat->SetMaterial();
int width, height;
Window->GetWindowSize(width, height);
int w = min(width, height) / 2;
for (int i = 0; i < 4; i++)
{
int x0 = (i & 1) * w;
int y0 = ((i >> 1) & 1) * w;
static const CVec3 colors[4] =
{
{ 1, 1, 1 }, { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } // normal, red, green, blue
};
glColor3fv(colors[i].v);
glBegin(GL_QUADS);
glTexCoord2f(1, 0);
glVertex2f(x0+w, y0);
glTexCoord2f(0, 0);
glVertex2f(x0, y0);
glTexCoord2f(0, 1);
glVertex2f(x0, y0+w);
glTexCoord2f(1, 1);
glVertex2f(x0+w, y0+w);
glEnd();
}
}
void CMaterialViewer::Draw3D(float TimeDelta)
{
if (IsTexture && ShowChannels) return;
static const CVec3 origin = { -150, 100, 100 };
// static const CVec3 origin = { -150, 50, 50 };
CVec3 lightPosV;
viewAxis.UnTransformVector(origin, lightPosV);
#if 0
// show light source
glDisable(GL_LIGHTING);
BindDefaultMaterial(true);
glBegin(GL_LINES);
glColor3f(1, 0, 0);
CVec3 tmp;
tmp = lightPosV;
tmp[0] -= 20; glVertex3fv(tmp.v); tmp[0] += 40; glVertex3fv(tmp.v);
tmp = lightPosV;
tmp[1] -= 20; glVertex3fv(tmp.v); tmp[1] += 40; glVertex3fv(tmp.v);
tmp = lightPosV;
tmp[2] -= 20; glVertex3fv(tmp.v); tmp[2] += 40; glVertex3fv(tmp.v);
glEnd();
#endif
glColor3f(1, 1, 1);
if (!IsTexture)
{
glEnable(GL_LIGHTING); // no lighting for textures
float lightPos[4];
lightPos[0] = lightPosV[0];
lightPos[1] = lightPosV[1];
lightPos[2] = lightPosV[2];
lightPos[3] = 0;
glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
// glMaterialf(GL_FRONT, GL_SHININESS, 20);
}
// bind material
UUnrealMaterial *Mat = static_cast<UUnrealMaterial*>(Object);
Mat->SetMaterial();
// check tangent space
GLint aNormal = -1;
GLint aTangent = -1;
// GLint aBinormal = -1;
const CShader *Sh = GCurrentShader;
if (Sh)
{
aNormal = Sh->GetAttrib("normal");
aTangent = Sh->GetAttrib("tangent");
// aBinormal = Sh->GetAttrib("binormal");
}
// and draw box ...
#define A 100
// vertex
#define V000 {-A, -A, -A}
#define V001 {-A, -A, A}
#define V010 {-A, A, -A}
#define V011 {-A, A, A}
#define V100 { A, -A, -A}
#define V101 { A, -A, A}
#define V110 { A, A, -A}
#define V111 { A, A, A}
static const CVec3 box[] =
{
V001, V000, V010, V011, // near (x=-A)
V111, V110, V100, V101, // far (x=+A)
V101, V100, V000, V001, // left (y=-A)
V011, V010, V110, V111, // right (y=+A)
V010, V000, V100, V110, // bottom (z=-A)
V001, V011, V111, V101, // top (z=+A)
#undef A
};
#define REP4(...) {__VA_ARGS__},{__VA_ARGS__},{__VA_ARGS__},{__VA_ARGS__}
static const CVec4 normal[] =
{
REP4(-1, 0, 0, 1 ),
REP4( 1, 0, 0, 1 ),
REP4( 0,-1, 0, 1 ),
REP4( 0, 1, 0, 1 ),
REP4( 0, 0,-1, 1 ),
REP4( 0, 0, 1, 1 )
};
static const CVec3 tangent[] =
{
REP4( 0,-1, 0 ),
REP4( 0, 1, 0 ),
REP4( 1, 0, 0 ),
REP4(-1, 0, 0 ),
REP4( 1, 0, 0 ),
REP4(-1, 0, 0 )
};
// static const CVec3 binormal[] =
// {
// REP4( 0, 0, 1 ),
// REP4( 0, 0, 1 ),
// REP4( 0, 0, 1 ),
// REP4( 0, 0, 1 ),
// REP4( 0,-1, 0 ),
// REP4( 0,-1, 0 )
// };
#undef REP4
static const float tex[][2] =
{
{0, 0}, {0, 1}, {1, 1}, {1, 0},
{0, 0}, {0, 1}, {1, 1}, {1, 0},
{0, 0}, {0, 1}, {1, 1}, {1, 0},
{0, 0}, {0, 1}, {1, 1}, {1, 0},
{0, 0}, {0, 1}, {1, 1}, {1, 0},
{0, 0}, {0, 1}, {1, 1}, {1, 0}
};
static const int inds[] =
{
0, 1, 2, 3,
4, 5, 6, 7,
8, 9,10,11,
12,13,14,15,
16,17,18,19,
20,21,22,23
};
#if 0
// verify tangents, should be suitable for binormal computation in shaders
// (note: we're not verifying correspondence with UV coordinates)
for (int i = 0; i < 24; i++)
{
CVec4 n4 = normal[i];
CVec3 n = n4.ToVec3();
CVec3 t = tangent[i];
CVec3 b = binormal[i];
CVec3 b2;
cross(n, t, b2);
VectorScale(b2, n4[3], b2);
float dd = VectorDistance(b2, b);
if (dd > 0.001f) appPrintf("dist[%d] = %g\n", i, dd);
}
#endif
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glVertexPointer(3, GL_FLOAT, sizeof(CVec3), box);
glNormalPointer(GL_FLOAT, sizeof(CVec4), normal);
glTexCoordPointer(2, GL_FLOAT, 0, tex);
if (aNormal >= 0)
{
glEnableVertexAttribArray(aNormal);
// send 4 components to decode binormal in shader
glVertexAttribPointer(aNormal, 4, GL_FLOAT, GL_FALSE, sizeof(CVec4), normal);
}
if (aTangent >= 0)
{
glEnableVertexAttribArray(aTangent);
glVertexAttribPointer(aTangent, 3, GL_FLOAT, GL_FALSE, sizeof(CVec3), tangent);
}
// if (aBinormal >= 0)
// {
// glEnableVertexAttribArray(aBinormal);
// glVertexAttribPointer(aBinormal, 3, GL_FLOAT, GL_FALSE, sizeof(CVec3), binormal);
// }
glDrawElements(GL_QUADS, ARRAY_COUNT(inds), GL_UNSIGNED_INT, inds);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
// disable tangents
if (aNormal >= 0)
glDisableVertexAttribArray(aNormal);
if (aTangent >= 0)
glDisableVertexAttribArray(aTangent);
// if (aBinormal >= 0)
// glDisableVertexAttribArray(aBinormal);
BindDefaultMaterial(true);
#if 0
glBegin(GL_LINES);
glColor3f(0.2, 0.2, 1);
for (int i = 0; i < ARRAY_COUNT(box); i++)
{
glVertex3fv(box[i].v);
CVec3 tmp;
VectorMA(box[i], 20, normal[i], tmp);
glVertex3fv(tmp.v);
}
glEnd();
glColor3f(1, 1, 1);
#endif
}