void render_smoke_trail_polygon ( vertex *poly, screen *texture, int additive )
{
int
outcode;
vertex
*tmp;
tmp = poly;
outcode = 0;
while ( tmp )
{
outcode |= tmp->outcode;
tmp = tmp->next_vertex;
}
if ( outcode )
{
clip_3d_coord = 0;
if ( outcode & CLIP_HITHER )
{
poly = hither_clip_3d_polygon ( poly, &outcode );
if ( !poly )
{
outcode = 0;
}
}
if ( outcode )
{
apply_perspective_to_polygon_texture ( poly );
poly = clip_3d_polygon ( poly, outcode );
if ( poly )
{
remove_perspective_from_polygon_texture ( poly );
}
}
}
if ( poly )
{
// d3d_fog_intensity = RGBA_MAKE ( 0, 0, 0, 255 );
//
// Set the required renderstates
//
set_d3d_int_state ( D3DRENDERSTATE_SPECULARENABLE, FALSE );
// set_d3d_int_state ( D3DRENDERSTATE_CULLMODE, D3DCULL_NONE );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSU, D3DTADDRESS_WRAP );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSV, D3DTADDRESS_WRAP );
set_d3d_texture_stage_state ( 0, D3DTSS_MAGFILTER, D3DTFG_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MINFILTER, D3DTFN_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MIPFILTER, D3DTFP_NONE );
if ( additive )
{
set_d3d_int_state ( D3DRENDERSTATE_SRCBLEND, D3DBLEND_ONE );
set_d3d_int_state ( D3DRENDERSTATE_DESTBLEND, D3DBLEND_ONE );
set_d3d_gouraud_shaded_textured_renderstate ( texture );
draw_wbuffered_gouraud_shaded_textured_polygon ( poly );
}
else
{
set_d3d_int_state ( D3DRENDERSTATE_SRCBLEND, D3DBLEND_SRCALPHA );
set_d3d_int_state ( D3DRENDERSTATE_DESTBLEND, D3DBLEND_INVSRCALPHA );
set_d3d_gouraud_shaded_textured_renderstate ( texture );
draw_wbuffered_gouraud_shaded_textured_polygon ( poly );
}
// set_d3d_int_state ( D3DRENDERSTATE_CULLMODE, D3DCULL_CCW );
}
}
void draw_3d_moon ( void )
{
vertex
*moon_polygon,
*vert,
moon_quad[4];
int
outcode,
outcode2,
count;
float
moon_width,
moon_height,
moon_depth;
matrix3x3
moon_matrix;
int
moon_red,
moon_green,
moon_blue;
real_colour
colour,
specular;
moon_polygon = moon_quad;
moon_width = 12000;
moon_height = 12000;
moon_depth = 100000;
moon_quad[0].next_vertex = &moon_quad[1];
moon_quad[1].next_vertex = &moon_quad[2];
moon_quad[2].next_vertex = &moon_quad[3];
moon_quad[3].next_vertex = NULL;
moon_quad[0].x = -moon_width/2;
moon_quad[0].y = moon_height/2;
moon_quad[0].z = moon_depth;
moon_quad[0].u = 0;
moon_quad[0].v = 0;
moon_quad[1].x = moon_width/2;
moon_quad[1].y = moon_height/2;
moon_quad[1].z = moon_depth;
moon_quad[1].u = 1;
moon_quad[1].v = 0;
moon_quad[2].x = moon_width/2;
moon_quad[2].y = -moon_height/2;
moon_quad[2].z = moon_depth;
moon_quad[2].u = 1;
moon_quad[2].v = 1;
moon_quad[3].x = -moon_width/2;
moon_quad[3].y = -moon_height/2;
moon_quad[3].z = moon_depth;
moon_quad[3].u = 0;
moon_quad[3].v = 1;
//
// Rotate the moon into position
//
get_3d_transformation_matrix ( moon_matrix, moon_3d_heading, moon_3d_pitch, 0 );
for ( count = 0; count < 4; count++ )
{
float
x,
y,
z;
x = moon_quad[count].x * moon_matrix[0][0] + moon_quad[count].y * moon_matrix[1][0] + moon_quad[count].z * moon_matrix[2][0];
y = moon_quad[count].x * moon_matrix[0][1] + moon_quad[count].y * moon_matrix[1][1] + moon_quad[count].z * moon_matrix[2][1];
z = moon_quad[count].x * moon_matrix[0][2] + moon_quad[count].y * moon_matrix[1][2] + moon_quad[count].z * moon_matrix[2][2];
moon_quad[count].x = x;
moon_quad[count].y = y;
moon_quad[count].z = z;
}
//
// Clip the moon to the horizon
//
clip_3d_coord = 0;
moon_polygon = horizon_clip_3d_polygon ( moon_quad );
if ( moon_polygon )
{
//
// Rotate the polygon around to the users viewpoint
//
vert = moon_polygon;
rotation_3d[0][0] = ( visual_3d_vp->xv.x );
rotation_3d[0][1] = ( visual_3d_vp->yv.x );
rotation_3d[0][2] = ( visual_3d_vp->zv.x );
rotation_3d[1][0] = ( visual_3d_vp->xv.y );
rotation_3d[1][1] = ( visual_3d_vp->yv.y );
rotation_3d[1][2] = ( visual_3d_vp->zv.y );
rotation_3d[2][0] = ( visual_3d_vp->xv.z );
rotation_3d[2][1] = ( visual_3d_vp->yv.z );
rotation_3d[2][2] = ( visual_3d_vp->zv.z );
outcode = 0;
outcode2 = CLIP_LEFT | CLIP_RIGHT | CLIP_TOP | CLIP_BOTTOM | CLIP_HITHER | CLIP_YONDER;
while ( vert )
{
float
x,
y,
z;
x = vert->x * rotation_3d[0][0] + vert->y * rotation_3d[1][0] + vert->z * rotation_3d[2][0];
y = vert->x * rotation_3d[0][1] + vert->y * rotation_3d[1][1] + vert->z * rotation_3d[2][1];
z = vert->x * rotation_3d[0][2] + vert->y * rotation_3d[1][2] + vert->z * rotation_3d[2][2];
x *= active_3d_environment->screen_i_scale;
y *= active_3d_environment->screen_j_scale;
if ( *( ( int * ) &z ) >= *( ( int * ) &clip_hither ) )
{
float
q,
i,
j;
float
oxmax,
oxmin,
oymax,
oymin;
int
ixmax,
ixmin,
iymax,
iymin;
q = 1.0 / z;
vert->x = x;
vert->y = y;
vert->z = z;
vert->q = q;
i = ( x * q );
j = ( y * q );
vert->j = active_3d_environment->y_origin - j;
vert->i = active_3d_environment->x_origin + i;
oxmax = active_viewport.x_max - vert->i;
oxmin = vert->i - active_viewport.x_min;
oymax = active_viewport.y_max - vert->j;
oymin = vert->j - active_viewport.y_min;
ixmax = *( ( int * ) &oxmax );
ixmin = *( ( int * ) &oxmin );
iymax = *( ( int * ) &oymax );
iymin = *( ( int * ) &oymin );
vert->outcode = generate_lookup_outcode ( ixmin, iymin, ixmax, iymax );
outcode |= vert->outcode;
outcode2 &= vert->outcode;
}
else
{
vert->outcode = CLIP_HITHER;
vert->z = z;
vert->x = x;
vert->y = y;
outcode |= vert->outcode;
outcode2 &= vert->outcode;
}
vert = vert->next_vertex;
}
if ( outcode2 )
{
return;
}
if ( outcode & CLIP_HITHER )
{
moon_polygon = hither_clip_3d_polygon ( moon_polygon, &outcode );
if ( !moon_polygon )
{
return;
}
}
if ( outcode )
{
apply_perspective_to_polygon_texture ( moon_polygon );
moon_polygon = clip_3d_polygon ( moon_polygon, outcode );
if ( !moon_polygon )
{
return;
}
remove_perspective_from_polygon_texture ( moon_polygon );
}
asm_convert_float_to_int ( ( moon_colour.red * 255 ), &moon_red );
asm_convert_float_to_int ( ( moon_colour.green * 255 ), &moon_green );
asm_convert_float_to_int ( ( moon_colour.blue * 255 ), &moon_blue );
colour.red = moon_red;
colour.green = moon_green;
colour.blue = moon_blue;
specular.colour = 0;
set_d3d_int_state ( D3DRENDERSTATE_ZFUNC, D3DCMP_ALWAYS );
set_d3d_int_state ( D3DRENDERSTATE_ZWRITEENABLE, FALSE );
suspend_d3d_fog ();
set_d3d_int_state ( D3DRENDERSTATE_SHADEMODE, D3DSHADE_GOURAUD );
set_d3d_int_state ( D3DRENDERSTATE_ALPHABLENDENABLE, TRUE );
set_d3d_int_state ( D3DRENDERSTATE_SRCBLEND, ADDITIVE_SOURCE_BLEND );
set_d3d_int_state ( D3DRENDERSTATE_DESTBLEND, ADDITIVE_DESTINATION_BLEND );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSU, D3DTADDRESS_CLAMP );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSV, D3DTADDRESS_CLAMP );
set_d3d_texture_stage_state ( 0, D3DTSS_MAGFILTER, D3DTFG_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MINFILTER, D3DTFN_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
set_d3d_texture ( 0, load_hardware_texture_map ( moon_texture ) );
draw_wbuffered_flat_shaded_textured_polygon ( moon_polygon, colour, specular );
set_d3d_int_state ( D3DRENDERSTATE_ALPHABLENDENABLE, FALSE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLOROP, D3DTOP_DISABLE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
set_d3d_texture ( 0, NULL );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAOP, D3DTOP_DISABLE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
reinstate_d3d_fog ();
set_d3d_int_state ( D3DRENDERSTATE_ZFUNC, zbuffer_default_comparison );
set_d3d_int_state ( D3DRENDERSTATE_ZWRITEENABLE, TRUE );
}
}
void draw_terrain_line ( int index1, int index2 )
{
int
outcode,
outcode2;
vertex
*line;
polygon_3d_vertices[0].x = transformed_3d_3d_points[index1].x;
polygon_3d_vertices[0].y = transformed_3d_3d_points[index1].y;
polygon_3d_vertices[0].z = transformed_3d_2d_points[index1].z;
polygon_3d_vertices[0].i = transformed_3d_2d_points[index1].i;
polygon_3d_vertices[0].j = transformed_3d_2d_points[index1].j;
polygon_3d_vertices[0].q = transformed_3d_2d_points[index1].q;
polygon_3d_vertices[0].outcode = transformed_3d_point_outcodes[index1];
polygon_3d_vertices[0].next_vertex = &polygon_3d_vertices[1];
polygon_3d_vertices[1].x = transformed_3d_3d_points[index2].x;
polygon_3d_vertices[1].y = transformed_3d_3d_points[index2].y;
polygon_3d_vertices[1].z = transformed_3d_2d_points[index2].z;
polygon_3d_vertices[1].i = transformed_3d_2d_points[index2].i;
polygon_3d_vertices[1].j = transformed_3d_2d_points[index2].j;
polygon_3d_vertices[1].q = transformed_3d_2d_points[index2].q;
polygon_3d_vertices[1].outcode = transformed_3d_point_outcodes[index2];
polygon_3d_vertices[1].next_vertex = NULL;
line = polygon_3d_vertices;
outcode = line->outcode;
outcode2 = line->outcode;
outcode |= line->next_vertex->outcode;
outcode2 &= line->next_vertex->outcode;
if ( outcode2 == 0 )
{
vertex
*line;
line = polygon_3d_vertices;
clip_3d_coord = 0;
if ( outcode & CLIP_HITHER )
{
line = hither_clip_3d_polygon ( line, &outcode );
}
if ( line )
{
if ( outcode )
{
line = clip_3d_polygon ( line, outcode );
}
if ( line )
{
real_colour
colour;
colour.red = 0;
colour.green = 0;
colour.blue = 0;
colour.alpha = 0;
d3d_fog_intensity = RGBA_MAKE ( 0, 0, 0, 255 );
draw_wbuffered_plain_line ( line, colour );
}
}
}
}
vertex * construct_sun_polygon ( matrix3x3 sun_matrix, vertex *sun_quad, float sun_width, float sun_height, float sun_depth )
{
vertex
*sun_polygon,
*vert;
int
outcode,
outcode2,
count;
sun_quad[0].next_vertex = &sun_quad[1];
sun_quad[1].next_vertex = &sun_quad[2];
sun_quad[2].next_vertex = &sun_quad[3];
sun_quad[3].next_vertex = NULL;
sun_quad[0].x = -sun_width/2;
sun_quad[0].y = sun_height/2;
sun_quad[0].z = sun_depth;
sun_quad[0].u = 0;
sun_quad[0].v = 0;
sun_quad[1].x = sun_width/2;
sun_quad[1].y = sun_height/2;
sun_quad[1].z = sun_depth;
sun_quad[1].u = 1;
sun_quad[1].v = 0;
sun_quad[2].x = sun_width/2;
sun_quad[2].y = -sun_height/2;
sun_quad[2].z = sun_depth;
sun_quad[2].u = 1;
sun_quad[2].v = 1;
sun_quad[3].x = -sun_width/2;
sun_quad[3].y = -sun_height/2;
sun_quad[3].z = sun_depth;
sun_quad[3].u = 0;
sun_quad[3].v = 1;
for ( count = 0; count < 4; count++ )
{
float
x,
y,
z;
x = sun_quad[count].x * sun_matrix[0][0] + sun_quad[count].y * sun_matrix[1][0] + sun_quad[count].z * sun_matrix[2][0];
y = sun_quad[count].x * sun_matrix[0][1] + sun_quad[count].y * sun_matrix[1][1] + sun_quad[count].z * sun_matrix[2][1];
z = sun_quad[count].x * sun_matrix[0][2] + sun_quad[count].y * sun_matrix[1][2] + sun_quad[count].z * sun_matrix[2][2];
sun_quad[count].x = x;
sun_quad[count].y = y;
sun_quad[count].z = z;
}
//
// Clip the sun to the horizon
//
clip_3d_coord = 0;
sun_polygon = horizon_clip_3d_polygon ( sun_quad );
if ( sun_polygon )
{
//
// Rotate the polygon around to the users viewpoint
//
vert = sun_polygon;
rotation_3d[0][0] = ( visual_3d_vp->xv.x );
rotation_3d[0][1] = ( visual_3d_vp->yv.x );
rotation_3d[0][2] = ( visual_3d_vp->zv.x );
rotation_3d[1][0] = ( visual_3d_vp->xv.y );
rotation_3d[1][1] = ( visual_3d_vp->yv.y );
rotation_3d[1][2] = ( visual_3d_vp->zv.y );
rotation_3d[2][0] = ( visual_3d_vp->xv.z );
rotation_3d[2][1] = ( visual_3d_vp->yv.z );
rotation_3d[2][2] = ( visual_3d_vp->zv.z );
outcode = 0;
outcode2 = CLIP_LEFT | CLIP_RIGHT | CLIP_TOP | CLIP_BOTTOM | CLIP_HITHER | CLIP_YONDER;
while ( vert )
{
float
x,
y,
z;
x = vert->x * rotation_3d[0][0] + vert->y * rotation_3d[1][0] + vert->z * rotation_3d[2][0];
y = vert->x * rotation_3d[0][1] + vert->y * rotation_3d[1][1] + vert->z * rotation_3d[2][1];
z = vert->x * rotation_3d[0][2] + vert->y * rotation_3d[1][2] + vert->z * rotation_3d[2][2];
x *= active_3d_environment->screen_i_scale;
y *= active_3d_environment->screen_j_scale;
if ( *( ( int * ) &z ) >= *( ( int * ) &clip_hither ) )
{
float
q,
i,
j;
float
oxmax,
oxmin,
oymax,
oymin;
int
ixmax,
ixmin,
iymax,
iymin;
q = 1.0 / z;
vert->x = x;
vert->y = y;
vert->z = z;
vert->q = q;
i = ( x * q );
j = ( y * q );
vert->j = active_3d_environment->y_origin - j;
vert->i = active_3d_environment->x_origin + i;
oxmax = active_viewport.x_max - vert->i;
oxmin = vert->i - active_viewport.x_min;
oymax = active_viewport.y_max - vert->j;
oymin = vert->j - active_viewport.y_min;
ixmax = *( ( int * ) &oxmax );
ixmin = *( ( int * ) &oxmin );
iymax = *( ( int * ) &oymax );
iymin = *( ( int * ) &oymin );
vert->outcode = generate_lookup_outcode ( ixmin, iymin, ixmax, iymax );
outcode |= vert->outcode;
outcode2 &= vert->outcode;
}
else
{
vert->outcode = CLIP_HITHER;
vert->z = z;
vert->x = x;
vert->y = y;
outcode |= vert->outcode;
outcode2 &= vert->outcode;
}
vert = vert->next_vertex;
}
if ( outcode2 )
{
return ( NULL );
}
if ( outcode & CLIP_HITHER )
{
sun_polygon = hither_clip_3d_polygon ( sun_polygon, &outcode );
if ( !sun_polygon )
{
return ( NULL );
}
}
if ( outcode )
{
apply_perspective_to_polygon_texture ( sun_polygon );
sun_polygon = clip_3d_polygon ( sun_polygon, outcode );
if ( !sun_polygon )
{
return ( NULL );
}
remove_perspective_from_polygon_texture ( sun_polygon );
}
if ( sun_polygon )
{
vertex
*p;
p = sun_polygon;
while ( p )
{
if ( p->q < clip_yonder_reciprocal )
{
p->q = clip_yonder_reciprocal;
}
p = p->next_vertex;
}
}
return ( sun_polygon );
}
else
{
return ( NULL );
}
}
void render_cloud_polygon ( int number_of_points, cloud_3d_textured_reference *point_references, vertex *transformed_points, cloud_3d_point *source_points, float alpha_blend, screen *texture )
{
int
count,
alpha,
first_point,
this_point,
previous_point,
outcode,
outcode2;
vertex
*polygon;
first_point = point_references->point;
this_point = first_point;
outcode = transformed_points[this_point].outcode;
outcode2 = transformed_points[this_point].outcode;
convert_float_to_int ( ( source_points[this_point].a * alpha_blend * 255 ), &alpha );
transformed_points[this_point].u = point_references->u;
transformed_points[this_point].v = point_references->v;
transformed_points[this_point].alpha = alpha;
point_references++;
for ( count = 1; count < number_of_points; count++ )
{
previous_point = this_point;
this_point = point_references->point;
outcode |= transformed_points[this_point].outcode;
outcode2 &= transformed_points[this_point].outcode;
convert_float_to_int ( ( source_points[this_point].a * alpha_blend * 255 ), &alpha );
transformed_points[this_point].u = point_references->u;
transformed_points[this_point].v = point_references->v;
transformed_points[this_point].alpha = alpha;
cloud_transformed_3d_points[previous_point].next_vertex = &cloud_transformed_3d_points[this_point];
point_references++;
}
cloud_transformed_3d_points[this_point].next_vertex = NULL;
if ( !outcode2 )
{
polygon = &cloud_transformed_3d_points[first_point];
clip_3d_coord = 0;
if ( outcode & CLIP_HITHER )
{
polygon = hither_clip_3d_polygon ( polygon, &outcode );
if ( !polygon )
{
return;
}
}
if ( outcode )
{
apply_perspective_to_polygon_texture ( polygon );
polygon = clip_3d_polygon ( polygon, outcode );
if ( !polygon )
{
return;
}
remove_perspective_from_polygon_texture ( polygon );
}
if ( polygon )
{
set_d3d_int_state ( D3DRENDERSTATE_SPECULARENABLE, FALSE );
set_d3d_int_state ( D3DRENDERSTATE_SRCBLEND, D3DBLEND_SRCALPHA );
set_d3d_int_state ( D3DRENDERSTATE_DESTBLEND, D3DBLEND_INVSRCALPHA );
set_d3d_gouraud_shaded_textured_renderstate ( texture );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSU, D3DTADDRESS_WRAP );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSV, D3DTADDRESS_WRAP );
set_d3d_texture_stage_state ( 0, D3DTSS_MAGFILTER, D3DTFG_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MINFILTER, D3DTFN_LINEAR );
{
int
number_of_vertices;
vertex
*vert;
LPD3DTLVERTEX vertices, vptr;
vert = polygon;
vertices = get_d3d_vertices_address ( polygon, &number_of_vertices );
vptr = vertices;
while ( vert )
{
real_colour
specular;
specular.colour = d3d_fog_intensity;
specular.red = vert->specular;
specular.green = vert->specular;
specular.blue = vert->specular;
*( ( int * ) &vptr->sx ) = *( ( int * ) &vert->i );
*( ( int * ) &vptr->sy ) = *( ( int * ) &vert->j );
*( ( int * ) &vptr->tu ) = *( ( int * ) &vert->u );
*( ( int * ) &vptr->tv ) = *( ( int * ) &vert->v );
*( ( int * ) &vptr->rhw ) = *( ( int * ) &vert->q );
vptr->sz = ( vert->q * zbuffer_factor ) + zbuffer_constant;
vptr->r = vert->red;
vptr->g = vert->green;
vptr->b = vert->blue;
vptr->a = vert->alpha;
vptr->color = vert->colour;
vptr->specular = specular.colour;
if ( vptr->sz >= 1.0 )
{
vptr->sz = 0.999;
}
vptr++;
vert = vert->next_vertex;
}
draw_fan_primitive ( number_of_vertices, vertices );
}
// draw_wbuffered_gouraud_shaded_textured_polygon ( polygon );
}
}
}
void draw_3d_lightning_cloud_burst ( lightning_strike *strike )
{
vertex
*polygon,
*vert,
quad[4];
float
width,
depth,
intensity;
vec3d
relative_position;
int
int_intensity,
outcode,
outcode2;
screen
*texture;
texture = system_textures[lightning_cloud_texture];
width = 30000;
depth = 30000;
if ( !strike->current_frame_number )
{
intensity = 0.5;
}
else
{
intensity = 1.0 / ( ( float ) strike->current_frame_number );
}
intensity /= 3;
quad[0].next_vertex = &quad[1];
quad[1].next_vertex = &quad[2];
quad[2].next_vertex = &quad[3];
quad[3].next_vertex = NULL;
quad[0].x = -width/2;
quad[0].y = 0;
quad[0].z = -depth/2;
quad[0].u = 0;
quad[0].v = 0;
quad[1].x = width/2;
quad[1].y = 0;
quad[1].z = -depth/2;
quad[1].u = 1;
quad[1].v = 0;
quad[2].x = width/2;
quad[2].y = 0;
quad[2].z = depth/2;
quad[2].u = 1;
quad[2].v = 1;
quad[3].x = -width/2;
quad[3].y = 0;
quad[3].z = depth/2;
quad[3].u = 0;
quad[3].v = 1;
polygon = quad;
//
// Calculate the relative position of the lightning strike
//
relative_position.x = ( ( strike->position.x - visual_3d_vp->x ) * visual_3d_vp->xv.x +
( strike->position.y - visual_3d_vp->y ) * visual_3d_vp->xv.y +
( strike->position.z - visual_3d_vp->z ) * visual_3d_vp->xv.z );
relative_position.y = ( ( strike->position.x - visual_3d_vp->x ) * visual_3d_vp->yv.x +
( strike->position.y - visual_3d_vp->y ) * visual_3d_vp->yv.y +
( strike->position.z - visual_3d_vp->z ) * visual_3d_vp->yv.z );
relative_position.z = ( ( strike->position.x - visual_3d_vp->x ) * visual_3d_vp->zv.x +
( strike->position.y - visual_3d_vp->y ) * visual_3d_vp->zv.y +
( strike->position.z - visual_3d_vp->z ) * visual_3d_vp->zv.z );
{
//
// Rotate the polygon around to the users viewpoint
//
vert = polygon;
rotation_3d[0][0] = ( visual_3d_vp->xv.x );
rotation_3d[0][1] = ( visual_3d_vp->yv.x );
rotation_3d[0][2] = ( visual_3d_vp->zv.x );
rotation_3d[1][0] = ( visual_3d_vp->xv.y );
rotation_3d[1][1] = ( visual_3d_vp->yv.y );
rotation_3d[1][2] = ( visual_3d_vp->zv.y );
rotation_3d[2][0] = ( visual_3d_vp->xv.z );
rotation_3d[2][1] = ( visual_3d_vp->yv.z );
rotation_3d[2][2] = ( visual_3d_vp->zv.z );
outcode = 0;
outcode2 = CLIP_LEFT | CLIP_RIGHT | CLIP_TOP | CLIP_BOTTOM | CLIP_HITHER | CLIP_YONDER;
clip_3d_coord = 0;
while ( vert )
{
float
x,
y,
z;
x = vert->x * rotation_3d[0][0] + vert->y * rotation_3d[1][0] + vert->z * rotation_3d[2][0] + relative_position.x;
y = vert->x * rotation_3d[0][1] + vert->y * rotation_3d[1][1] + vert->z * rotation_3d[2][1] + relative_position.y;
z = vert->x * rotation_3d[0][2] + vert->y * rotation_3d[1][2] + vert->z * rotation_3d[2][2] + relative_position.z;
x *= active_3d_environment->screen_i_scale;
y *= active_3d_environment->screen_j_scale;
if ( *( ( int * ) &z ) >= *( ( int * ) &clip_hither ) )
{
float
q,
i,
j;
float
oxmax,
oxmin,
oymax,
oymin;
int
ixmax,
ixmin,
iymax,
iymin;
q = 1.0 / z;
vert->x = x;
vert->y = y;
vert->z = z;
vert->q = q;
i = ( x * q );
j = ( y * q );
vert->j = active_3d_environment->y_origin - j;
vert->i = active_3d_environment->x_origin + i;
oxmax = active_viewport.x_max - vert->i;
oxmin = vert->i - active_viewport.x_min;
oymax = active_viewport.y_max - vert->j;
oymin = vert->j - active_viewport.y_min;
ixmax = *( ( int * ) &oxmax );
ixmin = *( ( int * ) &oxmin );
iymax = *( ( int * ) &oymax );
iymin = *( ( int * ) &oymin );
vert->outcode = generate_lookup_outcode ( ixmin, iymin, ixmax, iymax );
outcode |= vert->outcode;
outcode2 &= vert->outcode;
}
else
{
vert->outcode = CLIP_HITHER;
vert->z = z;
vert->x = x;
vert->y = y;
outcode |= vert->outcode;
outcode2 &= vert->outcode;
}
vert = vert->next_vertex;
}
if ( outcode2 )
{
return;
}
if ( outcode & CLIP_HITHER )
{
polygon = hither_clip_3d_polygon ( polygon, &outcode );
if ( !polygon )
{
return;
}
}
if ( outcode )
{
apply_perspective_to_polygon_texture ( polygon );
polygon = clip_3d_polygon ( polygon, outcode );
if ( !polygon )
{
return;
}
remove_perspective_from_polygon_texture ( polygon );
}
{
real_colour
colour,
specular;
set_d3d_alpha_fog_zbuffer ( TRUE, FALSE, TRUE, FALSE );
convert_float_to_int ( intensity * 255, &int_intensity );
colour.red = int_intensity;
colour.green = int_intensity;
colour.blue = int_intensity;
colour.alpha = int_intensity;
set_d3d_texture ( 0, texture );
set_d3d_texture_stage_state ( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
set_d3d_texture_stage_state ( 1, D3DTSS_COLOROP, D3DTOP_DISABLE );
set_d3d_int_state ( D3DRENDERSTATE_SRCBLEND, D3DBLEND_ONE );
set_d3d_int_state ( D3DRENDERSTATE_DESTBLEND, D3DBLEND_ONE );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSU, D3DTADDRESS_CLAMP );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSV, D3DTADDRESS_CLAMP );
set_d3d_texture_stage_state ( 0, D3DTSS_MAGFILTER, D3DTFG_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MINFILTER, D3DTFN_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MIPFILTER, D3DTFP_POINT );
specular.colour = 0;
draw_wbuffered_flat_shaded_textured_polygon ( polygon, colour, specular );
}
}
}
void draw_3d_polyline ( struct OBJECT_3D_POLYLINE *polyline )
{
int
segment,
outcode;
float
average_distance;
polyline_point
*points;
vertex
*line;
real_colour
colour;
//
// Connect the two vertices up
//
points = polyline->polyline->points;
segment = polyline->segment;
points[segment].transformed_point.next_vertex = &points[segment+1].transformed_point;
points[segment+1].transformed_point.next_vertex = NULL;
outcode = points[segment].transformed_point.outcode;
outcode |= points[segment+1].transformed_point.outcode;
//
// Calculate the average distance of the polyline
//
average_distance = ( points[segment].transformed_point.z + points[segment+1].transformed_point.z ) / 2.0;
//
// Set the fog value for this polyline
//
{
float
fog_intensity;
int
ifog_intensity;
fog_intensity = get_fog_distance_value ( average_distance );
convert_float_to_int ( fog_intensity, &ifog_intensity );
set_d3d_fog_face_intensity ( ifog_intensity );
}
//
// Calculate the lighting if required
//
if ( polyline->polyline->lit )
{
vec3d
point1,
point2,
plane_normal,
line_normal;
float
red,
green,
blue,
ndotn,
ndotp1,
ndotcamera,
direction_factor;
light_3d_source
*this_light;
int
ired,
igreen,
iblue;
//
// This bit is a work of a genius matey!
//
point1 = points[segment].world_point;
point2 = points[segment+1].world_point;
point1.x = ( ( point2.x - point1.x ) / 2 ) + point1.x;
point1.y = ( ( point2.y - point1.y ) / 2 ) + point1.y;
point1.z = ( ( point2.z - point1.z ) / 2 ) + point1.z;
plane_normal.x = point2.x - point1.x;
plane_normal.y = point2.y - point1.y;
plane_normal.z = point2.z - point1.z;
ndotn = ( ( plane_normal.x * plane_normal.x ) + ( plane_normal.y * plane_normal.y ) + ( plane_normal.z * plane_normal.z ) );
ndotp1 = ( ( point1.x * plane_normal.x ) + ( point1.y * plane_normal.y ) + ( point1.z * plane_normal.z ) );
ndotcamera = ( ( visual_3d_vp->x * plane_normal.x ) + ( visual_3d_vp->y * plane_normal.y ) + ( visual_3d_vp->z * plane_normal.z ) );
direction_factor = ( ( ndotp1 - ndotcamera ) / ndotn );
line_normal.x = visual_3d_vp->x + direction_factor * ( plane_normal.x );
line_normal.y = visual_3d_vp->y + direction_factor * ( plane_normal.y );
line_normal.z = visual_3d_vp->z + direction_factor * ( plane_normal.z );
line_normal.x = line_normal.x - point1.x;
line_normal.y = line_normal.y - point1.y;
line_normal.z = line_normal.z - point1.z;
normalise_any_3d_vector ( &line_normal );
this_light = current_3d_lights;
red = ambient_3d_light.colour.red;
green = ambient_3d_light.colour.green;
blue = ambient_3d_light.colour.blue;
while ( this_light )
{
float
intensity;
intensity = ( ( line_normal.x * this_light->lx ) + ( line_normal.y * this_light->ly ) + ( line_normal.z * this_light->lz ) );
if ( ( *( int * ) &intensity ) > ( *( int * ) &float_value_zero ) )
{
red += intensity * this_light->colour.red;
green += intensity * this_light->colour.green;
blue += intensity * this_light->colour.blue;
}
this_light = this_light->succ;
}
red = bound ( red, 0, 1 );
green = bound ( green, 0, 1 );
blue = bound ( blue, 0, 1 );
red *= polyline->polyline->colour.red;
green *= polyline->polyline->colour.green;
blue *= polyline->polyline->colour.blue;
red += FLOAT_FLOAT_FACTOR;
green += FLOAT_FLOAT_FACTOR;
blue += FLOAT_FLOAT_FACTOR;
ired = ( *( int * ) &red ) - INTEGER_FLOAT_FACTOR;
igreen = ( *( int * ) &green ) - INTEGER_FLOAT_FACTOR;
iblue = ( *( int * ) &blue ) - INTEGER_FLOAT_FACTOR;
colour.red = ired;
colour.green = igreen;
colour.blue = iblue;
colour.alpha = 0;
}
else
{
colour = polyline->polyline->colour;
}
//
// Go through all the vertices, creating lines to draw, then render them.
//
line = &points[segment].transformed_point;
clip_3d_coord = 0;
if ( outcode & CLIP_HITHER )
{
line = hither_clip_3d_polygon ( line, &outcode );
}
if ( line )
{
if ( outcode )
{
line = clip_3d_polygon ( line, outcode );
}
if ( line )
{
set_d3d_plain_renderstate ();
draw_wbuffered_plain_line ( line, colour );
}
}
}
void draw_3d_rain ( void )
{
point_3d_plain_reference
rain_point_references[2];
int
count,
outcode;
//
// Calculate the rotation matrix, to transform rain drops relative to the view.
//
rotation_3d[0][0] = ( visual_3d_vp->xv.x );
rotation_3d[0][1] = ( visual_3d_vp->yv.x );
rotation_3d[0][2] = ( visual_3d_vp->zv.x );
rotation_3d[1][0] = ( visual_3d_vp->xv.y );
rotation_3d[1][1] = ( visual_3d_vp->yv.y );
rotation_3d[1][2] = ( visual_3d_vp->zv.y );
rotation_3d[2][0] = ( visual_3d_vp->xv.z );
rotation_3d[2][1] = ( visual_3d_vp->yv.z );
rotation_3d[2][2] = ( visual_3d_vp->zv.z );
if ( rain_3d_raindrops_valid )
{
int
number_of_valid_raindrops;
float
rain_intensity;
int
rain_whiteness;
rain_intensity = ambient_3d_light.colour.red * 0.3 + ambient_3d_light.colour.green * 0.59 * ambient_3d_light.colour.blue * 0.11;
rain_intensity *= 4;
rain_intensity *= 255;
rain_intensity = bound ( rain_intensity, 0, 255 );
rain_whiteness = rain_intensity;
//
// Remeber the number of valid raindrops
//
number_of_valid_raindrops = rain_3d_raindrops_valid;
//
// Rotate the rain - putting the results in transformed_3d_points
//
transform_3d_rain ();
//
// Go through pairing up the transformed points, drawing lines between them.
//
rain_point_references[0].point = 0;
rain_point_references[1].point = 1;
set_d3d_alpha_fog_zbuffer ( TRUE, FALSE, TRUE, FALSE );
set_d3d_int_state ( D3DRENDERSTATE_SHADEMODE, D3DSHADE_GOURAUD );
set_d3d_texture ( 0, NULL );
set_d3d_texture_stage_state ( 0, D3DTSS_COLOROP, D3DTOP_DISABLE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAOP, D3DTOP_DISABLE );
for ( count = 0; count < number_of_valid_raindrops; count++ )
{
vertex
*line;
//
// Construct the 3d line
//
clip_3d_coord = 0;
line = construct_3d_line ( rain_point_references, ( count * 2 ), &outcode );
if ( line )
{
line->red = rain_whiteness;
line->green = rain_whiteness;
line->blue = rain_whiteness;
line->alpha = 32;
line->next_vertex->red = rain_whiteness;
line->next_vertex->green = rain_whiteness;
line->next_vertex->blue = rain_whiteness;
line->next_vertex->alpha = 192;
if ( outcode & CLIP_HITHER )
{
line = hither_clip_3d_polygon ( line, &outcode );
}
if ( line )
{
if ( outcode )
{
line = clip_3d_polygon ( line, outcode );
}
if ( line )
{
vertex
*point1,
*point2;
LPD3DTLVERTEX
vertices,
vptr;
vertices = get_d3d_line_vertices_points_address ();
vptr = vertices;
point2 = line;
point1 = line->next_vertex;
*( ( int * ) &vptr->sx ) = *( ( int * ) &point1->i );
*( ( int * ) &vptr->sy ) = *( ( int * ) &point1->j );
*( ( int * ) &vptr->rhw ) = *( ( int * ) &point1->q );
vptr->sz = ( point1->q * zbuffer_factor ) + zbuffer_constant;
vptr->r = point1->red;
vptr->g = point1->green;
vptr->b = point1->blue;
vptr->a = point1->alpha;
vptr->color = point1->colour;
vptr->specular = d3d_fog_intensity;
vptr++;
*( ( int * ) &vptr->sx ) = *( ( int * ) &point2->i );
*( ( int * ) &vptr->sy ) = *( ( int * ) &point2->j );
*( ( int * ) &vptr->rhw ) = *( ( int * ) &point2->q );
vptr->sz = ( point2->q * zbuffer_factor ) + zbuffer_constant;
vptr->r = point2->red;
vptr->g = point2->green;
vptr->b = point2->blue;
vptr->a = point2->alpha;
vptr->color = point2->colour;
vptr->specular = d3d_fog_intensity;
draw_line_primitive ( vertices );
}
}
}
}
flush_line_primitives ();
set_d3d_alpha_fog_zbuffer ( FALSE, TRUE, TRUE, TRUE );
}
if ( rain_3d_snowdrops_valid )
{
real_colour
snow_specular,
snow_colour;
//
// Rotate the rain - putting the results in transformed_3d_points
//
transform_3d_snow ();
set_d3d_alpha_fog_zbuffer ( TRUE, FALSE, FALSE, FALSE );
//
// First, set the snow texture
//
set_d3d_texture ( 0, load_hardware_texture_map ( snow_3d_texture ) );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSU, D3DTADDRESS_CLAMP );
set_d3d_texture_stage_state ( 0, D3DTSS_ADDRESSV, D3DTADDRESS_CLAMP );
set_d3d_texture_stage_state ( 0, D3DTSS_MAGFILTER, D3DTFG_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_MINFILTER, D3DTFN_LINEAR );
set_d3d_texture_stage_state ( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
set_d3d_texture_stage_state ( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
set_d3d_texture_stage_state ( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
snow_colour.red = 255;
snow_colour.green = 255;
snow_colour.blue = 255;
snow_colour.alpha = 255;
snow_specular.colour = d3d_fog_intensity;
for ( count = 0; count < rain_3d_snowdrops_valid; count++ )
{
vertex
*poly,
snow_quad[4];
if ( !transformed_3d_points[count].outcode )
{
float
width,
height;
int
outcode;
//
// We know the raindrop is on the screen ( to a certain extent )
//
width = active_3d_environment->screen_i_scale * snow_particle_radius * transformed_3d_points[count].q;
height = active_3d_environment->screen_j_scale * snow_particle_radius * transformed_3d_points[count].q;
snow_quad[0].q = transformed_3d_points[count].q;
snow_quad[0].i = transformed_3d_points[count].i - ( width / 2 );
snow_quad[0].j = transformed_3d_points[count].j - ( height / 2 );
snow_quad[0].u = 0;
snow_quad[0].v = 0;
snow_quad[0].outcode = generate_3d_outcode ( snow_quad[0].i, snow_quad[0].j );
snow_quad[0].next_vertex = &snow_quad[1];
snow_quad[1].q = transformed_3d_points[count].q;
snow_quad[1].i = transformed_3d_points[count].i + ( width / 2 );
snow_quad[1].j = transformed_3d_points[count].j - ( height / 2 );
snow_quad[1].u = 1;
snow_quad[1].v = 0;
snow_quad[1].outcode = generate_3d_outcode ( snow_quad[1].i, snow_quad[1].j );
snow_quad[1].next_vertex = &snow_quad[2];
snow_quad[2].q = transformed_3d_points[count].q;
snow_quad[2].i = transformed_3d_points[count].i + ( width / 2 );
snow_quad[2].j = transformed_3d_points[count].j + ( height / 2 );
snow_quad[2].u = 1;
snow_quad[2].v = 1;
snow_quad[2].outcode = generate_3d_outcode ( snow_quad[2].i, snow_quad[2].j );
snow_quad[2].next_vertex = &snow_quad[3];
snow_quad[3].q = transformed_3d_points[count].q;
snow_quad[3].i = transformed_3d_points[count].i - ( width / 2 );
snow_quad[3].j = transformed_3d_points[count].j + ( height / 2 );
snow_quad[3].u = 0;
snow_quad[3].v = 1;
snow_quad[3].outcode = generate_3d_outcode ( snow_quad[3].i, snow_quad[3].j );
snow_quad[3].next_vertex = NULL;
outcode = snow_quad[0].outcode;
outcode |= snow_quad[1].outcode;
outcode |= snow_quad[2].outcode;
outcode |= snow_quad[3].outcode;
poly = snow_quad;
if ( outcode )
{
clip_3d_coord = 0;
poly = clip_3d_polygon ( poly, outcode );
}
if ( poly )
{
draw_wbuffered_flat_shaded_textured_polygon ( poly, snow_colour, snow_specular );
}
}
}
set_d3d_alpha_fog_zbuffer ( FALSE, TRUE, TRUE, TRUE );
}
}
void render_clipped_3d_terrain_tree_gouraud_textured_diffuse_lit_polygon ( object_3d_face *this_face, struct OBJECT_3D_INFO *object_base )
{
int
triangle_count,
outcode;
vertex
*poly;
texture_map
*texture;
texture = &system_textures[current_object_3d_surface->texture_index];
for ( triangle_count = 0; triangle_count < ( this_face->number_of_points - 2 ); triangle_count++ )
{
poly = NULL;
/*construct_3d_vertex_gouraud_coloured_textured_triangle_fan ( triangle_count,
current_object_3d_point_list,
current_object_3d_gouraud_list,
current_object_3d_texture_list,
object_base->points_base,
&outcode,
current_tree_colour_red,
current_tree_colour_green,
current_tree_colour_blue,
current_tree_colour_alpha );
*/
if ( poly )
{
if ( outcode )
{
clip_3d_coord = 0;
if ( outcode & CLIP_HITHER )
{
poly = hither_clip_3d_polygon ( poly, &outcode );
if ( !poly )
{
continue;
}
}
if ( outcode )
{
apply_perspective_to_polygon_texture ( poly );
poly = clip_3d_polygon ( poly, outcode );
if ( !poly )
{
continue;
}
remove_perspective_from_polygon_texture ( poly );
}
}
// set_d3d_int_state ( D3DRENDERSTATE_TEXTUREMAG, current_object_3d_texture_filter );
// set_d3d_int_state ( D3DRENDERSTATE_TEXTUREMIN, current_object_3d_texture_mipmap );
// set_d3d_int_state ( D3DRENDERSTATE_TEXTUREADDRESS, current_object_3d_texture_address );
// draw_d3d_gouraud_shaded_textured_polygon ( poly, texture );
}
}
}
void render_clipped_3d_terrain_tree_textured_diffuse_lit_polygon ( object_3d_face *this_face, struct OBJECT_3D_INFO *object_base )
{
vertex
*poly;
texture_map
*texture;
texture = &system_textures[current_object_3d_surface->texture_index];
{
real_colour
colour;
float
red,
green,
blue;
int
ired,
igreen,
iblue;
//
// Look up the colour of the face normal
//
red = current_object_3d_transformed_normals[current_object_3d_face_normal_list->point].r;
green = current_object_3d_transformed_normals[current_object_3d_face_normal_list->point].g;
blue = current_object_3d_transformed_normals[current_object_3d_face_normal_list->point].b;
red *= current_tree_colour_red;
green *= current_tree_colour_green;
blue *= current_tree_colour_blue;
convert_float_to_int ( red, &ired );
convert_float_to_int ( green, &igreen );
convert_float_to_int ( blue, &iblue );
colour.red = ired;
colour.green = igreen;
colour.blue = iblue;
colour.alpha = 255;
poly = NULL;
/*construct_3d_vertex_textured_polygon ( this_face->number_of_points,
current_object_3d_point_list,
current_object_3d_texture_list,
object_base->points_base );
*/
clip_3d_coord = 0;
if ( current_object_3d_outcode & CLIP_HITHER )
{
poly = hither_clip_3d_polygon ( poly, ¤t_object_3d_outcode );
if ( !poly )
{
return;
}
}
if ( current_object_3d_outcode )
{
apply_perspective_to_polygon_texture ( poly );
poly = clip_3d_polygon ( poly, current_object_3d_outcode );
if ( !poly )
{
return;
}
remove_perspective_from_polygon_texture ( poly );
}
// set_d3d_int_state ( D3DRENDERSTATE_TEXTUREMAG, current_object_3d_texture_filter );
// set_d3d_int_state ( D3DRENDERSTATE_TEXTUREMIN, current_object_3d_texture_mipmap );
// set_d3d_int_state ( D3DRENDERSTATE_TEXTUREADDRESS, current_object_3d_texture_address );
// draw_d3d_flat_shaded_textured_polygon ( poly, texture, colour );
}
}