253 lines
7 KiB
C
253 lines
7 KiB
C
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/*
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* Copyright (c) 1993-1995 Argonaut Technologies Limited. All rights reserved.
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*
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* $Id: modrend.c 2.6 1996/09/06 12:01:00 sam Exp $
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* $Locker: $
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*
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* Model rendering
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*/
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#include "v1db.h"
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#include "shortcut.h"
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#include "brassert.h"
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#include "formats.h"
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BR_RCS_ID("$Id: modrend.c 2.6 1996/09/06 12:01:00 sam Exp $")
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/*
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* Render model faces
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*/
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static void renderFaces(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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if(model->stored) {
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if(on_screen == BRT_ACCEPT)
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GeometryStoredRenderOnScreen(model->stored, v1db.renderer);
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else
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GeometryStoredRender(model->stored, v1db.renderer);
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} else if(model->prepared) {
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if(on_screen == BRT_ACCEPT)
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GeometryV1ModelRenderOnScreen(v1db.format_model, v1db.renderer, model->prepared, material->stored, BRT_TRIANGLE);
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else
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GeometryV1ModelRender(v1db.format_model, v1db.renderer, model->prepared, material->stored, BRT_TRIANGLE);
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}
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}
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/*
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* Render model edges
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*/
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static void renderEdges(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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if(on_screen == BRT_ACCEPT)
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GeometryV1ModelRenderOnScreen(v1db.format_model, v1db.renderer, model->prepared, material->stored, BRT_LINE);
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else
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GeometryV1ModelRender(v1db.format_model, v1db.renderer, model->prepared, material->stored, BRT_LINE);
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}
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/*
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* Render model points
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*/
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static void renderPoints(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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if(on_screen == BRT_ACCEPT)
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GeometryV1ModelRenderOnScreen(v1db.format_model, v1db.renderer, model->prepared, material->stored, BRT_POINT);
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else
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GeometryV1ModelRender(v1db.format_model, v1db.renderer, model->prepared, material->stored, BRT_POINT);
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}
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/*
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* Render function for BR_RSTYLE_NONE
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*/
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static void nullRender(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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}
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/*
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* A pre-preocessed static cuboid model that we can fill in with
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* appropriate vertex values to represent a bounding box
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*
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* Another way to do this is to use a cube model, and prepend a scale+xform
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* that matches it to the bounds - this has the disadvantage of making
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* the lighting do funny things unless BR_LIGHT_VIEW is used. I would prefer
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* that the user only has to do this when they themselves have created
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* a funny transform.
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*/
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/*
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* 8 Vertices
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*/
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static struct fmt_vertex bounds_vertices[] = {
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{BR_VECTOR3(-1,-1,-1),BR_VECTOR2(0,0),BR_VECTOR3(-0.666,-0.333,-0.666)}, /* 0 */
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{BR_VECTOR3(-1,-1, 1),BR_VECTOR2(0,0),BR_VECTOR3(-0.333,-0.666, 0.666)}, /* 1 */
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{BR_VECTOR3(-1, 1,-1),BR_VECTOR2(0,1),BR_VECTOR3(-0.408, 0.816,-0.408)}, /* 2 */
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{BR_VECTOR3(-1, 1, 1),BR_VECTOR2(0,1),BR_VECTOR3(-0.816, 0.408, 0.408)}, /* 3 */
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{BR_VECTOR3( 1,-1,-1),BR_VECTOR2(1,0),BR_VECTOR3( 0.408,-0.816,-0.408)}, /* 4 */
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{BR_VECTOR3( 1,-1, 1),BR_VECTOR2(1,0),BR_VECTOR3( 0.816,-0.408, 0.408)}, /* 5 */
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{BR_VECTOR3( 1, 1,-1),BR_VECTOR2(1,1),BR_VECTOR3( 0.666, 0.333,-0.666)}, /* 6 */
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{BR_VECTOR3( 1, 1, 1),BR_VECTOR2(1,1),BR_VECTOR3( 0.333, 0.666, 0.666)}, /* 7 */
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};
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/*
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* 12 Faces
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*/
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static struct v11face bounds_faces[] = {
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{{5,6,7},{ 0,13,14}, BR_VECTOR4( 1, 0, 0,1)}, /* 6 */
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{{5,4,6},{ 3, 4, 0}, BR_VECTOR4( 1, 0, 0,1)}, /* 1 */
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{{7,6,2},{13, 6, 0}, BR_VECTOR4( 0, 1, 0,1)}, /* 9 */
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{{7,2,3},{ 0, 5,16}, BR_VECTOR4( 0, 1, 0,1)}, /* 10 */
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{{1,5,7},{11,14, 0}, BR_VECTOR4( 0, 0, 1,1)}, /* 7 */
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{{1,7,3},{ 0,16,12}, BR_VECTOR4( 0, 0, 1,1)}, /* 8 */
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{{3,0,1},{ 0, 8,12}, BR_VECTOR4(-1, 0, 0,1)}, /* 5 */
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{{3,2,0},{ 5, 1, 0}, BR_VECTOR4(-1, 0, 0,1)}, /* 0 */
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{{1,0,4},{ 8, 9, 0}, BR_VECTOR4( 0,-1, 0,1)}, /* 3 */
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{{1,4,5},{ 0, 3,11}, BR_VECTOR4( 0,-1, 0,1)}, /* 4 */
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{{0,6,4},{ 0, 4, 9}, BR_VECTOR4( 0, 0,-1,1)}, /* 11 */
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{{0,2,6},{ 1, 6, 0}, BR_VECTOR4( 0, 0,-1,1)}, /* 2 */
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};
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static br_colour bounds_colours[12];
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/*
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* 1 Group
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*/
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static struct v11group bounds_face_groups[] = {
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{NULL,bounds_faces,bounds_colours, NULL,0, bounds_vertices, bounds_colours, NULL, 12, 8, 18}
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};
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STATIC struct v11model bounds_prepared = {
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0,0,1,BR_VECTOR3(0,0,0),
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bounds_face_groups
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};
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STATIC struct br_model bounds_model = {
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0,
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"Bounds",
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NULL,
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NULL,
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0,0,
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BR_VECTOR3(0,0,0),
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0,
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NULL,
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NULL,
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0,
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0,
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0,
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{0},
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&bounds_prepared,
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NULL
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};
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/*
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* Fills in above cuboid mesh that represents the given bounding box
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*/
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static struct br_model * makeMeshFromBounds(br_bounds *b)
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{
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int i;
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/*
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* Fill in vertices
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*/
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BrVector3Set(&bounds_vertices[0].p,b->min.v[X],b->min.v[Y],b->min.v[Z]);
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BrVector3Set(&bounds_vertices[1].p,b->min.v[X],b->min.v[Y],b->max.v[Z]);
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BrVector3Set(&bounds_vertices[2].p,b->min.v[X],b->max.v[Y],b->min.v[Z]);
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BrVector3Set(&bounds_vertices[3].p,b->min.v[X],b->max.v[Y],b->max.v[Z]);
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BrVector3Set(&bounds_vertices[4].p,b->max.v[X],b->min.v[Y],b->min.v[Z]);
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BrVector3Set(&bounds_vertices[5].p,b->max.v[X],b->min.v[Y],b->max.v[Z]);
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BrVector3Set(&bounds_vertices[6].p,b->max.v[X],b->max.v[Y],b->min.v[Z]);
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BrVector3Set(&bounds_vertices[7].p,b->max.v[X],b->max.v[Y],b->max.v[Z]);
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/*
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* Fill in plane equations of faces
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*/
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for(i=0; i< 3; i++) {
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bounds_faces[ i*2].eqn.v[3] = bounds_faces[1+i*2].eqn.v[3] = b->max.v[i];
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bounds_faces[6+i*2].eqn.v[3] = bounds_faces[7+i*2].eqn.v[3] = -b->min.v[i];
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}
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/*
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* Fill in bounds
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*/
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bounds_model.bounds = *b;
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return &bounds_model;
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}
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/*
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* Render bounding box points
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*/
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static void boundingBoxRenderPoints(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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renderPoints(actor,makeMeshFromBounds(&model->bounds), material, render_data, style, on_screen);
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}
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/*
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* Render bounding box edges
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*/
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static void boundingBoxRenderEdges(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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renderEdges(actor,makeMeshFromBounds(&model->bounds), material, render_data, style, on_screen);
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}
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/*
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* Render bounding box faces
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*/
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static void boundingBoxRenderFaces(br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen)
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{
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renderFaces(actor,makeMeshFromBounds(&model->bounds),material, render_data, style,on_screen);
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}
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/*
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* Table of rendering functions indexed by style
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*/
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void (*RenderStyleCalls[])(
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br_actor *actor,
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br_model *model,
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br_material *material,
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void *render_data,
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br_uint_8 style,
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int on_screen) = {
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renderFaces, /* BR_RSTYLE_DEFAULT */
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nullRender, /* BR_RSTYLE_NONE */
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renderPoints, /* BR_RSTYLE_POINTS */
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renderEdges, /* BR_RSTYLE_EDGES */
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renderFaces, /* BR_RSTYLE_FACES */
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boundingBoxRenderPoints, /* BR_RSTYLE_BOUNDING_POINTS */
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boundingBoxRenderEdges, /* BR_RSTYLE_BOUNDING_EDGES */
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boundingBoxRenderFaces, /* BR_RSTYLE_BOUNDING_FACES */
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};
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