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1989-03-18
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QRT Sample Programs
Introduction
The following are actual QRT input files. They can be used as a
guide to suggested QRT indenting style, or as a quick reference
to QRT commands. They both use most of the advanced features of
QRT, and would be good examples of QRT programming. These files
require QRT 1.4 or later to run correctly.
File One
{**************************************************
Walls with sphere - demonstrates pattern
mapping to sphere surfaces.
Rendered with QRT ray tracer on Amiga 1000
- Steve Koren 8 Jun 88
**************************************************}
FILE_NAME = Wall_Sphere.RAW
{ ********* Some pattern definitions ********** }
PATTERN ( x_size = 16, { ** A stripe pattern ** }
y_size = 8, { ** for the sphere ** }
name = MIRROR_STRIPE,
RECTANGLE (
start_x = 0, start_y = 0,
end_x = 16, end_y = 4,
diff = (.1, .1, .1),
mirror = (.8, .8, .8),
)
)
PATTERN ( x_size = 60, { ** Checkered pattern ** }
y_size = 60,
name = CHECK,
RECTANGLE (
QRT Ray Tracer Page 1 QRT Sample Programs
start_x = 0,
start_y = 0,
end_x = 30,
end_y = 30,
diff = (.1,1.0,.1),
)
RECTANGLE (
start_x = 30,
start_y = 30,
end_x = 60,
end_y = 60,
diff = (.1,1.0,.1),
)
)
PATTERN ( x_size = 40, { ** Checkered pattern ** }
y_size = 40,
name = CHECK_BLUE,
RECTANGLE (
start_x = 0,
start_y = 0,
end_x = 20,
end_y = 20,
diff = (.7,.2,.7)
amb = (.32, .32, .32),
reflect = .55
sreflect= 20
)
RECTANGLE (
start_x = 20,
start_y = 20,
end_x = 40,
end_y = 40,
diff = (.7,.5,.7),
amb = (.32, .32, .32),
reflect = .55
sreflect= 20
)
)
PATTERN ( x_size = 80, { ** brick pattern ** }
y_size = 50,
name = BRICK,
RECTANGLE ( { 1st half brick 1 }
start_x = 0, start_y = 2,
end_x = 18, end_y = 23,
diff = (1.00, .20, .20);
)
RECTANGLE ( { 2nd hald brick 1 }
start_x = 62, start_y = 2,
end_x = 80, end_y = 23,
diff = (1.00, .20, .20);
QRT Ray Tracer Page 2 QRT Sample Programs
)
RECTANGLE ( { brick 2 }
start_x = 22, start_y = 2,
end_x = 58, end_y = 23,
diff = (.80, .20, .20);
)
RECTANGLE ( { brick 3 }
start_x = 2, start_y = 27,
end_x = 38, end_y = 48,
diff = (.85, .35, .10);
)
RECTANGLE ( { brick 4 }
start_x = 42, start_y = 27,
end_x = 78, end_y = 48,
diff = (.70, .25, .20);
)
)
{ ******************* OBJECTS ******************* }
{ ** ground ** }
PARALLELOGRAM ( loc = ( -10000, 0, -10000),
v1 = (20000, 0, 0),
v2 = ( 0, 0, 20000),
diff = ( .8, .8, 0),
pattern = CHECK
xmult = 2
ymult = 2
)
BEGIN_BBOX
BEGIN_BBOX
SPHERE ( loc = (200, 50, -80),
radius = 35,
diff = (.7, .3, .5),
pattern = MIRROR_STRIPE,
xmult = 1.5,
ymult = 1.5
)
QUADRATIC ( loc = (200, 0, -80),
a = 1,
b = 0,
c = 1,
QRT Ray Tracer Page 3 QRT Sample Programs
d = 150,
xmin = -13,
xmax = 13,
ymin = 0,
ymax = 50,
zmin = -13,
zmax = 13,
diff = (.1, .1, .1),
mirror = (.8, .8, .8)
)
END_BBOX
BEGIN_BBOX
SPHERE ( loc = (200, 90, 80),
radius = 35,
diff = (.3, .3, .8),
amb = (.32, .32, .32),
reflect = .40
sreflect = 20
pattern = CHECK_BLUE,
xmult = 1.0,
ymult = 1.0
)
QUADRATIC ( loc = (200, 0, 80),
a = 1,
b = 0,
c = 1,
d = 150,
xmin = -13,
xmax = 13,
ymin = 0,
ymax = 90,
zmin = -13,
zmax = 13,
diff = (.1, .1, .1),
mirror = (.8, .8, .8)
)
END_BBOX
END_BBOX
QRT Ray Tracer Page 4 QRT Sample Programs
BEGIN_BBOX
{ ** a small brick wall ** }
PARALLELOGRAM ( loc = (150, 00, -15),
v1 = (0, 0, 30),
v2 = (0, 100, 0)
diff = (1, 1, 1),
pattern = BRICK
xmult = .5,
ymult = .5
)
PARALLELOGRAM ( loc = (150, 00, -15),
v1 = (100, 0, 0),
v2 = (0, 100, 0)
diff = (1, 1, 1),
pattern = BRICK
xmult = .5,
ymult = .5
)
PARALLELOGRAM ( loc = (150, 00, 15),
v1 = (100, 0, 0),
v2 = (0, 100, 0)
diff = (1, 1, 1),
pattern = BRICK
xmult = .5,
ymult = .5
)
END_BBOX
{ ** An observer ** }
OBSERVER ( loc = (-20 , 70, -40),
lookat = (200, 50, 0)
)
{ ** A lamp ** }
LAMP ( loc = (120, 120, -50),
radius = 5,
dist = 80
QRT Ray Tracer Page 5 QRT Sample Programs
)
LAMP ( loc = (120, 150, 80),
radius = 5,
dist = 70
)
SKY ( horiz = (.2, .2, .55),
zenith = (.1, .1, .25),
dither = 4
)
DEFAULT ( x_res = 320, { ** parameters for Amiga ** }
y_res = 400
aspect= .56
)
FOC_LENGTH = 50
QRT Ray Tracer Page 6 QRT Sample Programs
FILE 2
{ **************************************************
Glass table with vase and candy bowl. This
is the first test of glass surfaces, and came out
surprisingly well - it actually does look like
glass! This image requires QRT 1.4 to run.
Rendered with QRT rayracing system
Steve Koren - 23 AUG 88
************************************************** }
FILE_NAME = Table.RAW
PATTERN ( x_size = 80,
y_size = 30,
name = BLOCK,
RECTANGLE (
start_x = 3, start_y = 3,
end_x = 77, end_y = 27,
diff = (.8, .7, .4);
)
)
PATTERN ( x_size = 90,
y_size = 90,
name = FLOOR,
RECTANGLE (
start_x = 0, start_y = 0,
end_x = 55, end_y = 55,
diff = (.1, .8, .1)
)
RECTANGLE (
start_x = 60, start_y = 0
end_x = 85 end_y = 55
diff = (.2, .3, .8)
)
RECTANGLE (
start_x = 0, start_y = 60
end_x = 55 end_y = 85
diff = (.2, .3, .8)
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)
)
BEGIN_INSTANCES
{ ** glass table leg - hollow glass cylender ** }
NAME = table_leg;
BEGIN_BBOX
QUADRATIC ( loc = (0, 0, 0),
a = 1, b = 0, c = 1,
d = 300,
xmin = -18, xmax = 18,
ymin = 0, ymax = 70,
zmin = -18, zmax = 18,
diff = (0, 0, 0),
trans = (.7, .7, .7),
mirror = (.25, .25, .25),
index = 1.33,
density = (.022, .022, .022)
)
QUADRATIC ( loc = (0, 0, 0),
a = 1, b = 0, c = 1,
d = 144,
xmin = -12, xmax = 12,
ymin = 0, ymax = 70,
zmin = -12, zmax = 12,
diff = (0, 0, 0),
trans = (1, 1, 1),
mirror = (.1, .1, .1),
index = 1.33,
density = (.022, .022, .022)
)
END_BBOX
END_INSTANCES
{ ******************** GROUND ********************** }
PARALLELOGRAM ( loc = (-10000, 0, -10000),
v1 = (0,0, 20000),
v2 = (20000, 0, 0)
diff = (.1, .1, .1),
pattern = BLOCK
QRT Ray Tracer Page 8 QRT Sample Programs
)
{ ******************** OBJECTS ********************** }
{ ** FLOOR ** }
PARALLELOGRAM ( loc = (80, .01, -20),
v1 = (240, 0, 0),
v2 = (0, 0, 240),
diff = (0, 0, 0)
pattern = FLOOR
xmult = .8,
ymult = .8
)
{ ** TABLE LEGS ** }
BEGIN_BBOX
INSTANCE_OF ( name = table_leg,
loc = (140, 0, 40)
)
INSTANCE_OF ( name = table_leg,
loc = (260, 0, 40)
)
END_BBOX
BEGIN_BBOX
INSTANCE_OF ( name = table_leg,
loc = (140, 0, 160)
)
INSTANCE_OF ( name = table_leg,
loc = (260, 0, 160)
)
END_BBOX
{ ** TABLE TOP ** }
BEGIN_BBOX
PARALLELOGRAM ( loc = (100, 70, 0),
v1 = (0, 0, 200),
v2 = (200, 0, 0),
diff = (0, 0, 0),
trans = (.7, .7, .7),
mirror = (.23, .23, .23),
index = 1.33,
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density = (.015, .015, .015)
)
PARALLELOGRAM ( loc = (100, 85, 0),
v1 = (0, 0, 200),
v2 = (200, 0, 0),
diff = (0, 0, 0),
trans = (1, 1, 1),
mirror = (.25, .25, .25),
index = 1.33,
density = (.015, .015, .015)
)
{ ** SIDES ** }
PARALLELOGRAM ( loc = (100, 70, 0),
v1 = (0, 0, 200),
v2 = (0, 15, 0),
diff = (0, 0, 0),
trans = (.7, .7, .7),
mirror = (.23, .23, .23),
index = 1.33,
density = (.016, .016, .016)
)
PARALLELOGRAM ( loc = (100, 70, 0),
v1 = (200, 0, 0),
v2 = (0, 15, 0),
diff = (0, 0, 0),
trans = (.7, .7, .7),
mirror = (.23, .23, .23),
index = 1.33,
density = (.016, .016, .016)
)
PARALLELOGRAM ( loc = (100, 70, 200),
v1 = (200, 0, 0),
v2 = (0, 15, 0),
diff = (0, 0, 0),
trans = (.7, .7, .7),
mirror = (.23, .23, .23),
index = 1.33,
density = (.016, .016, .016)
)
PARALLELOGRAM ( loc = (300, 70, 0),
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v1 = (0, 0, 200),
v2 = (0, 15, 0),
diff = (0, 0, 0),
trans = (.7, .7, .7),
mirror = (.23, .23, .23),
index = 1.33,
density = (.016, .016, .016)
)
END_BBOX
{ ** CANDY BOWL & VASE ** }
BEGIN_BBOX
BEGIN_BBOX
QUADRATIC ( loc = (200, 100, 100),
a = 1, b = 2, c = 1,
d = 900,
xmin = -30, xmax = 30,
ymin = -15, ymax = 0,
zmin = -30, zmax = 30,
diff = (1, .1, .1),
reflect = .8
sreflect= 20
)
SPHERE ( loc = (185, 95, 110),
radius = 7,
diff = (.1, .1, 1)
)
SPHERE ( loc = (200, 93, 80),
radius = 7,
diff = (.1, 1, .1)
)
END_BBOX
{ ** VASE ** }
BEGIN_BBOX
QUADRATIC ( loc = (260, 85, 50),
a = 1, b = 0, c = 1,
d = 100,
xmin = -10, xmax = 10,
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ymin = 0, ymax = 50,
zmin = -10, zmax = 10,
diff = (.1, .7, .1),
reflect = .7,
sreflect=20
)
END_BBOX
END_BBOX
OBSERVER ( loc = (-50, 180, -30)
lookat = (180, 50, 100)
)
SKY ( horiz = (.10, .1, .75)
zenith = (.10, .1, .60)
dither = 4
)
LAMP ( loc = (150, 250, -80)
radius = 5,
dist = 250
)
LAMP ( loc = (250, 50, 250),
radius = 5,
dist = 60
)
DEFAULT ( x_res = 320, { Amiga parameters }
y_res = 400
aspect= .56
)
FOC_LENGTH = 50
QRT Ray Tracer Page 12 QRT Sample Programs
