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https://github.com/TTimo/GtkRadiant.git
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* brush primitive patch by divVerent
git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/trunk@299 8a3a26a2-13c4-0310-b231-cf6edde360e5
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mattn
parent
28fda9304d
commit
9fa4db610e
3 changed files with 303 additions and 60 deletions
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@ -423,6 +423,94 @@ void Face_TextureVectors (face_t *f, float STfromXYZ[2][4])
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}
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}
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long double HighestImpactSign (long double a, long double b)
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{
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// returns the sign of the value with larger abs
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if (a + b > 0)
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return +1;
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else
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return -1;
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}
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void Face_TexdefFromTextureVectors (face_t *f, long double STfromXYZ[2][4], vec3_t pvecs[2], int sv, int tv)
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{
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texdef_t *td;
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qtexture_t *q;
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int j;
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long double ang;
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td = &f->texdef;
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q = f->d_texture;
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// undo the texture transform
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for (j=0 ; j<4 ; j++) {
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STfromXYZ[0][j] *= q->width;
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STfromXYZ[1][j] *= q->height;
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}
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// shift
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td->shift[0] = STfromXYZ[0][3];
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td->shift[1] = STfromXYZ[1][3];
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/**
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* SOLVE:
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* STfromXYZ[0][sv] = (cosv * pvecs[0][sv] - sinv * pvecs[0][tv]) / td->scale[0];
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* STfromXYZ[0][tv] = (sinv * pvecs[0][sv] + cosv * pvecs[0][tv]) / td->scale[0];
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* STfromXYZ[1][sv] = (cosv * pvecs[1][sv] - sinv * pvecs[1][tv]) / td->scale[1];
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* STfromXYZ[1][tv] = (sinv * pvecs[1][sv] + cosv * pvecs[1][tv]) / td->scale[1];
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* FOR:
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* sinv, cosv, td->scale[0], td->scale[1]
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* WE KNOW:
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* sinv^2 + cosv^2 = 1
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* pvecs[0][sv] is +/-1
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* pvecs[0][tv] is 0
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* pvecs[1][sv] is 0
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* pvecs[1][tv] is +/-1
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* THUS:
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* STfromXYZ[0][sv] = +cosv * pvecs[0][sv] / td->scale[0];
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* STfromXYZ[0][tv] = +sinv * pvecs[0][sv] / td->scale[0];
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* STfromXYZ[1][sv] = -sinv * pvecs[1][tv] / td->scale[1];
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* STfromXYZ[1][tv] = +cosv * pvecs[1][tv] / td->scale[1];
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*/
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td->scale[0] = sqrt(STfromXYZ[0][sv]*STfromXYZ[0][sv] + STfromXYZ[0][tv]*STfromXYZ[0][tv]);
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td->scale[1] = sqrt(STfromXYZ[1][sv]*STfromXYZ[1][sv] + STfromXYZ[1][tv]*STfromXYZ[1][tv]);
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if (td->scale[0])
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td->scale[0] = 1 / td->scale[0]; // avoid NaNs
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if (td->scale[1])
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td->scale[1] = 1 / td->scale[1];
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long double sign0tv = (STfromXYZ[0][tv] > 0) ? +1 : -1;
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ang = atan2( sign0tv * STfromXYZ[0][tv], sign0tv * STfromXYZ[0][sv]); // atan2(y, x) with y positive is in [0, PI[
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// STOP
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// We have until now ignored the fact that td->scale[0] or td->scale[1] may
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// have either sign (+ or -). Due to roundoff errors, our choice of
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// sign0tv may even have been wrong in a sense.
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// sign0tv may NOT indicate the appropriate sign for td->scale[0] (namely,
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// if cosv is near zero)!
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// let's look at the signs again
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// sign0sv = signcosv * pvecs[0][sv] / td->scale[0]sign
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// sign0tv = pvecs[0][sv] / td->scale[0]sign
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// sign1sv = -1 * pvecs[1][tv] / td->scale[1]sign
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// sign1tv = signcosv * pvecs[1][tv] / td->scale[1]sign
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// -->
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// td->scale[1]sign = sign1tv * signcosv * pvecs[1][tv]
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// td->scale[1]sign = -sign1sv * signsinv * pvecs[1][tv]
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// td->scale[0]sign = sign0tv * signsinv * pvecs[0][sv]
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// td->scale[0]sign = sign0sv * signcosv * pvecs[0][sv]
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// which to choose?
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// the one with the larger impact on the original texcoords, of course
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// to minimize the effect of roundoff errors that may flip the signs!
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td->scale[0] *= HighestImpactSign(STfromXYZ[0][tv] * +sin(ang), STfromXYZ[0][sv] * cos(ang)) * pvecs[0][sv];
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td->scale[1] *= HighestImpactSign(STfromXYZ[1][sv] * -sin(ang), STfromXYZ[1][tv] * cos(ang)) * pvecs[1][tv];
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td->rotate = ang * 180 / Q_PI; // FIXME possibly snap this to 0/90/180 (270 can't happen)?
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}
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/*
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================
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Face_MakePlane
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@ -462,6 +550,135 @@ void EmitTextureCoordinates ( float *xyzst, qtexture_t *q, face_t *f)
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xyzst[4] = DotProduct (xyzst, STfromXYZ[1]) + STfromXYZ[1][3];
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}
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long double SarrusDetScalar(long double a1, long double b1, long double c1, long double a2, long double b2, long double c2, long double a3, long double b3, long double c3)
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{
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return a1 * b2 * c3 + a2 * b3 * c1 + a3 * b1 * c2
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- a1 * c2 * b3 - a2 * c3 * b1 - a3 * c1 * b2;
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}
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void SarrusSolve(long double a1, long double b1, long double c1, long double d1, long double a2, long double b2, long double c2, long double d2, long double a3, long double b3, long double c3, long double d3, long double *a, long double *b, long double *c)
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{
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long double det;
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det = SarrusDetScalar(a1, b1, c1,
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a2, b2, c2,
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a3, b3, c3);
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*a = SarrusDetScalar(d1, b1, c1,
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d2, b2, c2,
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d3, b3, c3) / det;
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*b = SarrusDetScalar(a1, d1, c1,
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a2, d2, c2,
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a3, d3, c3) / det;
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*c = SarrusDetScalar(a1, b1, d1,
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a2, b2, d2,
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a3, b3, d3) / det;
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}
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void Face_TexdefFromTextureCoordinates ( float *xyzst1, float *xyzst2, float *xyzst3, qtexture_t *q, face_t *f)
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{
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vec3_t pvecs[2];
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int sv, tv, uv;
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long double STfromXYZ[2][4];
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// get natural texture axis
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TextureAxisFromPlane(&f->plane, pvecs[0], pvecs[1]);
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if (pvecs[0][0])
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sv = 0;
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else if (pvecs[0][1])
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sv = 1;
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else
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sv = 2;
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if (pvecs[1][0])
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tv = 0;
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else if (pvecs[1][1])
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tv = 1;
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else
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tv = 2;
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uv = 3 - sv - tv; // the "other one"
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// find the STfromXYZ 4-vectors
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/*
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SARRUS-SOLVE:
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xyzst1[3] == xyzst1[sv] * STfromXYZ[0][sv] + xyzst1[tv] * STfromXYZ[0][tv] + STfromXYZ[0][3];
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xyzst2[3] == xyzst2[sv] * STfromXYZ[0][sv] + xyzst2[tv] * STfromXYZ[0][tv] + STfromXYZ[0][3];
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xyzst3[3] == xyzst3[sv] * STfromXYZ[0][sv] + xyzst3[tv] * STfromXYZ[0][tv] + STfromXYZ[0][3];
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FOR: STfromXYZ[0]
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GIVEN: one coord of them (uv) is empty (see Face_TextureVectors)
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SARRUS-SOLVE:
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xyzst1[4] == xyzst1[sv] * STfromXYZ[1][sv] + xyzst1[tv] * STfromXYZ[1][tv] + STfromXYZ[1][3];
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xyzst2[4] == xyzst2[sv] * STfromXYZ[1][sv] + xyzst2[tv] * STfromXYZ[1][tv] + STfromXYZ[1][3];
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xyzst3[4] == xyzst3[sv] * STfromXYZ[1][sv] + xyzst3[tv] * STfromXYZ[1][tv] + STfromXYZ[1][3];
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FOR: STfromXYZ[1]
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GIVEN: one coord of them (uv) is empty (see Face_TextureVectors)
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*/
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STfromXYZ[0][uv] = 0;
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SarrusSolve(
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xyzst1[sv], xyzst1[tv], 1, xyzst1[3],
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xyzst2[sv], xyzst2[tv], 1, xyzst2[3],
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xyzst3[sv], xyzst3[tv], 1, xyzst3[3],
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&STfromXYZ[0][sv], &STfromXYZ[0][tv], &STfromXYZ[0][3]
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);
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STfromXYZ[1][uv] = 0;
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SarrusSolve(
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xyzst1[sv], xyzst1[tv], 1, xyzst1[4],
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xyzst2[sv], xyzst2[tv], 1, xyzst2[4],
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xyzst3[sv], xyzst3[tv], 1, xyzst3[4],
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&STfromXYZ[1][sv], &STfromXYZ[1][tv], &STfromXYZ[1][3]
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);
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/*
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printf("%s\n", q->name);
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printf("%f == %Lf\n", xyzst1[3], DotProduct (xyzst1, STfromXYZ[0]) + STfromXYZ[0][3]);
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printf("%f == %Lf\n", xyzst2[3], DotProduct (xyzst2, STfromXYZ[0]) + STfromXYZ[0][3]);
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printf("%f == %Lf\n", xyzst3[3], DotProduct (xyzst3, STfromXYZ[0]) + STfromXYZ[0][3]);
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printf("%f == %Lf\n", xyzst1[4], DotProduct (xyzst1, STfromXYZ[1]) + STfromXYZ[1][3]);
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printf("%f == %Lf\n", xyzst2[4], DotProduct (xyzst2, STfromXYZ[1]) + STfromXYZ[1][3]);
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printf("%f == %Lf\n", xyzst3[4], DotProduct (xyzst3, STfromXYZ[1]) + STfromXYZ[1][3]);
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float newSTfromXYZ[2][4];
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printf("old: %Lf,%Lf,%Lf,%Lf %Lf,%Lf,%Lf,%Lf\n",
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STfromXYZ[0][0], STfromXYZ[0][1], STfromXYZ[0][2], STfromXYZ[0][3],
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STfromXYZ[1][0], STfromXYZ[1][1], STfromXYZ[1][2], STfromXYZ[1][3]);
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*/
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Face_TexdefFromTextureVectors (f, STfromXYZ, pvecs, sv, tv);
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/*
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Face_TextureVectors(f, newSTfromXYZ);
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printf("new: %f,%f,%f,%f %f,%f,%f,%f\n",
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newSTfromXYZ[0][0], newSTfromXYZ[0][1], newSTfromXYZ[0][2], newSTfromXYZ[0][3],
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newSTfromXYZ[1][0], newSTfromXYZ[1][1], newSTfromXYZ[1][2], newSTfromXYZ[1][3]);
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float newxyzst1[5];
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float newxyzst2[5];
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float newxyzst3[5];
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VectorCopy(xyzst1, newxyzst1);
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VectorCopy(xyzst2, newxyzst2);
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VectorCopy(xyzst3, newxyzst3);
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EmitTextureCoordinates (newxyzst1, q, f);
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EmitTextureCoordinates (newxyzst2, q, f);
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EmitTextureCoordinates (newxyzst3, q, f);
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printf("Face_TexdefFromTextureCoordinates: %f,%f %f,%f %f,%f -> %f,%f %f,%f %f,%f\n",
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xyzst1[3], xyzst1[4],
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xyzst2[3], xyzst2[4],
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xyzst3[3], xyzst3[4],
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newxyzst1[3], newxyzst1[4],
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newxyzst2[3], newxyzst2[4],
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newxyzst3[3], newxyzst3[4]);
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// TODO why do these differ, but not the previous ones? this makes no sense whatsoever
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*/
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}
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//==========================================================================
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/*
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@ -388,8 +388,9 @@ void Face_FitTexture_BrushPrimit( face_t *f, vec3_t mins, vec3_t maxs, int nHeig
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// ConvertTexMatWithQTexture( &f->brushprimit_texdef, NULL, &f->brushprimit_texdef, f->d_texture );
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}
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void BrushPrimitFaceToFace(face_t *face)
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void BrushPrimitFaceToFace(face_t *f)
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{
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#if 0
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// we have parsed brush primitives and need conversion back to standard format
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// NOTE: converting back is a quick hack, there's some information lost and we can't do anything about it
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// FIXME: if we normalize the texture matrix to a standard 2x2 size, we end up with wrong scaling
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@ -399,6 +400,30 @@ void BrushPrimitFaceToFace(face_t *face)
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TexMatToFakeTexCoords( aux.coords, face->texdef.shift, &face->texdef.rotate, face->texdef.scale );
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face->texdef.scale[0]/=2.0;
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face->texdef.scale[1]/=2.0;
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#else
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// new method by divVerent@alientrap.org: Shift and scale no longer get lost when opening a BP map in texdef mode.
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vec3_t texX,texY;
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vec3_t proj;
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vec_t ST[3][5];
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ComputeAxisBase(f->plane.normal,texX,texY);
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VectorCopy(f->plane.normal,proj);
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VectorScale(proj,f->plane.dist,proj);
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VectorCopy(proj,ST[0]);
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VectorCopy(texX,ST[1]);
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VectorAdd(ST[1],proj,ST[1]);
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VectorCopy(texY,ST[2]);
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VectorAdd(ST[2],proj,ST[2]);
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ST[0][3] = f->brushprimit_texdef.coords[0][2];
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ST[0][4] = f->brushprimit_texdef.coords[1][2];
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ST[1][3] = f->brushprimit_texdef.coords[0][0] + ST[0][3];
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ST[1][4] = f->brushprimit_texdef.coords[1][0] + ST[0][4];
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ST[2][3] = f->brushprimit_texdef.coords[0][1] + ST[0][3];
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ST[2][4] = f->brushprimit_texdef.coords[1][1] + ST[0][4];
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Face_TexdefFromTextureCoordinates(ST[0], ST[1], ST[2], f->d_texture, f);
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#endif
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}
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// TEXTURE LOCKING -----------------------------------------------------------------------------------------------------
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@ -535,6 +535,7 @@ void BrushPrimitFaceToFace(face_t *f);
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void EmitBrushPrimitTextureCoordinates(face_t *, winding_t *);
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// EmitTextureCoordinates, is old code used for brush to brush primitive conversion
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void EmitTextureCoordinates ( float *xyzst, qtexture_t *q, face_t *f);
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void Face_TexdefFromTextureCoordinates ( float *xyzst1, float *xyzst2, float *xyzst3, qtexture_t *q, face_t *f);
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//void BrushPrimit_Parse(brush_t *);
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// compute a fake shift scale rot representation from the texture matrix
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void TexMatToFakeTexCoords( vec_t texMat[2][3], float shift[2], float *rot, float scale[2] );
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