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gl_bumpmap.c
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gl_bumpmap.c
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/*
Copyright (C) 2001-2002 Charles Hollemeersch
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
PENTA: the whole file is freakin penta...
This is mostly leftover code from tenebrae1 the bumpmaps are done in the drivers now.
*/
#include "quakedef.h"
void GL_EnableColorShader (qboolean specular) {
//glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
//primary color = light color
//tu0 = light filter cube map
//tu1 = material color map
GL_SelectTexture(GL_TEXTURE0_ARB);
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
GL_SelectTexture(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, currentshadowlight->filtercube);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PREVIOUS_ARB);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_TEXTURE);
glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);
if (!specular) {
GL_EnableMultitexture();
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PREVIOUS_ARB);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_TEXTURE);
glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);
} else {
GL_EnableMultitexture();
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PREVIOUS_ARB);
glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_TEXTURE);
glTexEnvf (GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_ALPHA);
glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);
}
}
void GL_DisableColorShader (qboolean specular) {
if (!specular) {
GL_DisableMultitexture();
} else {
glTexEnvf (GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);
GL_DisableMultitexture();
}
glEnable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
}
/*
Draw incoming fragment to destination alpha.
Note: A fragment in the next comment means a pixel that will be drawn on the screen
(gl has some specific definition of it)
*/
void GL_DrawAlpha() {
glColorMask(false, false, false, true);
glDisable(GL_BLEND);
}
/*
Draw incoming fragment by modulating it with destination alpha
*/
void GL_ModulateAlphaDrawAlpha() {
glColorMask(false, false, false, true);
glBlendFunc (GL_DST_ALPHA, GL_ZERO);
glEnable (GL_BLEND);
}
/*
Draw incoming fragment by adding it to destination alpha
*/
void GL_AddAlphaDrawAlpha() {
glColorMask(false, false, false, true);
glBlendFunc (GL_ONE, GL_ONE);
glEnable (GL_BLEND);
}
/*
Draw incoming fragment by modulation it with destination alpha
*/
void GL_ModulateAlphaDrawColor() {
glColorMask(true, true, true, true);
glBlendFunc (GL_DST_ALPHA, GL_ONE);
glEnable (GL_BLEND);
}
/*
Draw incoming alpha squared to destination alpha
*/
void GL_DrawSquareAlpha() {
glColorMask(false, false, false, true);
glBlendFunc (GL_SRC_ALPHA, GL_ZERO);
glEnable (GL_BLEND);
}
/*
Square the destination alpha
*/
void GL_SquareAlpha() {
glColorMask(false, false, false, true);
glBlendFunc (GL_ZERO, GL_DST_ALPHA);
glEnable (GL_BLEND);
}
/*
Add incoming fragment to destination color
*/
void GL_AddColor() {
glColorMask(true, true, true, true);
glBlendFunc (GL_ONE, GL_ONE);
glEnable (GL_BLEND);
}
/*
Ovewrite destination color with incoming fragment
*/
void GL_DrawColor() {
glColorMask(true, true, true, true);
glDisable (GL_BLEND);
}
/*
=================
R_WorldToObjectMatrix
Returns a world to object coordinate transformation matrix.
This is crap and I know it ;)
The problem is that quake does strange stuff with its angles
(look at R_RotateForEntity) so inverting the matrix will
certainly give the desired result.
Why I use the gl matrix? Well quake doesn't have build in matix
routines an I don't have any lying around in c (Lot's in Pascal
of course i'm a Delphi man)
=================
*/
void R_WorldToObjectMatrix(entity_t *e, matrix_4x4 result)
{
matrix_4x4 world;
glPushMatrix();
glLoadIdentity();
R_RotateForEntity (e);
glGetFloatv (GL_MODELVIEW_MATRIX, &world[0][0]);
glPopMatrix();
MatrixAffineInverse(world,result);
}
/*
=============
GL_SetupCubeMapMatrix
Loads the current matrix with a tranformation used for light filters
-Put object space into world space
-Then put this worldspace into lightspace
=============
*/
void GL_SetupCubeMapMatrix(const transform_t *tr) {
glRotatef (-currentshadowlight->angles[0], 1, 0, 0);
glRotatef (-currentshadowlight->angles[1], 0, 1, 0);
glRotatef (-currentshadowlight->angles[2], 0, 0, 1);
glTranslatef(-currentshadowlight->origin[0],
-currentshadowlight->origin[1],
-currentshadowlight->origin[2]);
glTranslatef (tr->origin[0], tr->origin[1], tr->origin[2]);
glRotatef (tr->angles[1], 0, 0, 1);
glRotatef (-tr->angles[0], 0, 1, 0);
glRotatef (tr->angles[2], 1, 0, 0);
}
/*
=============
GL_SetupAttenMatrix
Loads the current matrix with a tranformation used for light filters
-Put object space into world space
-Then put this worldspace into lightspace
(Ignore light angles as the boxes don't rotate with the light)
=============
*/
void GL_SetupAttenMatrix(const transform_t *tr) {
glTranslatef(-currentshadowlight->origin[0],
-currentshadowlight->origin[1],
-currentshadowlight->origin[2]);
glTranslatef (tr->origin[0], tr->origin[1], tr->origin[2]);
glRotatef (tr->angles[1], 0, 0, 1);
glRotatef (-tr->angles[0], 0, 1, 0);
glRotatef (tr->angles[2], 1, 0, 0);
}
void PrintScreenPos(vec3_t v) {
double Dproject_matrix[16];
double Dworld_matrix[16];
GLint Iviewport[4]; // <AWE> changed from int to GLint.
double px, py, pz;
glGetDoublev (GL_MODELVIEW_MATRIX, Dworld_matrix);
glGetDoublev (GL_PROJECTION_MATRIX, Dproject_matrix);
glGetIntegerv (GL_VIEWPORT, Iviewport);
gluProject(v[0], v[1], v[2],
Dworld_matrix, Dproject_matrix, Iviewport, &px, &py, &pz);
Con_Printf("Pos: %f %f %f\n", px, py, pz);
}
/*
=============
R_DrawBrushObjectLight
Idea: Creepy object oriented programming by using function pointers.
Function: Puts the light into object space, adapts the world->eye matrix
and calls BrushGeoSender if all that has been done.
Cleans up afterwards so nothing has changed.
=============
*/
void R_DrawBrushObjectLight(entity_t *e,void (*BrushGeoSender) (entity_t *e)) {
model_t *clmodel;
currententity = e;
currenttexture = -1;
clmodel = e->model;
glPushMatrix ();
e->angles[0] = -e->angles[0]; // stupid quake bug
R_RotateForEntity (e);
e->angles[0] = -e->angles[0]; // stupid quake bug
BrushGeoSender(e);
glPopMatrix ();
}
/*
=================
R_DrawAliasObjectLight
Same as R_DrawBrushObjectLight but with alias models
=================
*/
void R_DrawAliasObjectLight(entity_t *e,void (*AliasGeoSender) (aliashdr_t *paliashdr, aliasframeinstant_t* instant))
{
aliashdr_t *paliashdr;
alias3data_t *data;
vec3_t oldlightpos, oldvieworg;
aliasframeinstant_t *aliasframeinstant;
int i,maxnumsurf;
currententity = e;
glPushMatrix ();
R_RotateForEntity (e);
//
// locate the proper data
//
data = (alias3data_t *)Mod_Extradata (e->model);
maxnumsurf = data->numSurfaces;
aliasframeinstant = e->aliasframeinstant;
for (i=0;i<maxnumsurf;++i){
paliashdr = (aliashdr_t *)((char*)data + data->ofsSurfaces[i]);
if (!aliasframeinstant) {
glPopMatrix();
Con_Printf("R_DrawAliasObjectLight: missing instant for ent %s\n", e->model->name);
return;
}
if (aliasframeinstant->shadowonly) continue;
if ((e->frame >= paliashdr->numframes) || (e->frame < 0))
{
glPopMatrix();
return;
}
//Draw it!
AliasGeoSender(paliashdr,aliasframeinstant);
aliasframeinstant = aliasframeinstant->_next;
} /* for paliashdr */
glPopMatrix();
}
void SetColorForAtten(vec3_t point) {
vec3_t dist;
float colorscale;
VectorSubtract(point, currentshadowlight->origin, dist);
colorscale = 1 - (Length(dist) / currentshadowlight->radius);
glColor3f(currentshadowlight->color[0]*colorscale,
currentshadowlight->color[1]*colorscale,
currentshadowlight->color[2]*colorscale);
}
/*
=================
R_DrawSpriteModelWV
Draw a sprite texture with as tex0 coordinates the world space position of it's vertexes.
tex1 is the sprites texture coordinates.
=================
*/
void R_DrawSpriteModelLight (entity_t *e)
{
mspriteframe_t *frame;
msprite_t *psprite;
float *up, *right;
vec3_t point;
frame = R_GetSpriteFrame (e);
psprite = currententity->model->cache.data;
up = vup;
right = vright;
if (frame->shader->flags & SURF_NODRAW) return;
//We don't do full bumpapping on sprites only additive cube*attenuation*colormap
if (!frame->shader->numcolorstages) return;
GL_BindAdvanced(frame->shader->colorstages[0].texture[0]);
glBegin (GL_QUADS);
qglMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0, 1);
VectorMA (e->origin, frame->down, up, point);
VectorMA (point, frame->left, right, point);
SetColorForAtten(point);
glVertex3fv (point);
qglMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0, 0);
VectorMA (e->origin, frame->up, up, point);
VectorMA (point, frame->left, right, point);
SetColorForAtten(point);
glVertex3fv (point);
qglMultiTexCoord2fARB(GL_TEXTURE0_ARB, 1, 0);
VectorMA (e->origin, frame->up, up, point);
VectorMA (point, frame->right, right, point);
SetColorForAtten(point);
glVertex3fv (point);
qglMultiTexCoord2fARB(GL_TEXTURE0_ARB, 1, 1);
VectorMA (e->origin, frame->down, up, point);
VectorMA (point, frame->right, right, point);
SetColorForAtten(point);
glVertex3fv (point);
glEnd ();
}
void R_DrawSpriteModelLightWV (entity_t *e)
{
mspriteframe_t *frame;
msprite_t *psprite;
float *up, *right;
vec3_t point;
frame = R_GetSpriteFrame (e);
psprite = currententity->model->cache.data;
up = vup;
right = vright;
if (frame->shader->flags & SURF_NODRAW) return;
//We don't do full bumpapping on sprites only additive cube*attenuation*colormap
if (!frame->shader->numcolorstages) return;
GL_BindAdvanced(frame->shader->colorstages[0].texture[0]);
glBegin (GL_QUADS);
qglMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0, 1);
VectorMA (e->origin, frame->down, up, point);
VectorMA (point, frame->left, right, point);
glTexCoord3fv(point);
glVertex3fv (point);
qglMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0, 0);
VectorMA (e->origin, frame->up, up, point);
VectorMA (point, frame->left, right, point);
glTexCoord3fv(point);
SetColorForAtten(point);
glVertex3fv (point);
qglMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1, 0);
VectorMA (e->origin, frame->up, up, point);
VectorMA (point, frame->right, right, point);
glTexCoord3fv(point);
SetColorForAtten(point);
glVertex3fv (point);
qglMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1, 1);
VectorMA (e->origin, frame->down, up, point);
VectorMA (point, frame->right, right, point);
glTexCoord3fv(point);
SetColorForAtten(point);
glVertex3fv (point);
glEnd ();
}