Merge pull request #1 from Caenneth/read-scene-graph-from-file

Read scene graph from file

obj/chair/chair2.mtl

@@ -0,0 +1,13 @@
+# Blender MTL File: 'StuhlEingeklappt_mit_Tisch.blend'
+# Material Count: 1
+
+newmtl Material.001
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd C:\\Users\\Finn_\\Desktop\\Wood_Wool_Combined_Vertical_V2.png

obj/chair/chair2.obj

@@ -0,0 +1,206 @@
+# Blender v2.83.20 OBJ File: 'StuhlEingeklappt_mit_Tisch.blend'
+# www.blender.org
+mtllib StuhlEingeklappt_mit_Tisch_NewTexture_V2.mtl
+o Cube_Cube.003
+v -1.230000 0.820000 0.150000
+v -1.230000 0.840000 0.150000
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+vn 1.0000 0.0000 0.0000
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+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+usemtl Material.001
+s off
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+f 3/5/2 4/6/2 8/7/2 7/8/2
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+f 3/13/5 7/14/5 5/11/5 1/1/5
+f 8/7/6 4/6/6 2/15/6 6/16/6
+o Lehne_Cube.002
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+usemtl Material.001
+s off
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+f 11/29/11 15/30/11 13/27/11 9/17/11
+f 16/23/12 12/22/12 10/31/12 14/32/12
+o Polster_Lehne_Cube.005
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+usemtl Material.001
+s off
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+f 19/49/17 23/50/17 21/51/17 17/52/17
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+s off
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+o Stuhl_Cube.001
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+v -0.312695 0.587190 -0.700000
+v -0.332013 0.592366 0.000000
+v -0.312695 0.587190 0.000000
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+s off
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obj/chalkboard/Chalkboard.obj

@@ -1,6 +1,6 @@
 # Blender v2.83.20 OBJ File: 'Chalkboard.blend'
 # www.blender.org
-mtllib Chalkboard_without_Poles.mtl
+mtllib Chalkboard.mtl
 o Board_Left_Cube.007
 v -0.010000 0.100000 -0.103724
 v -0.010000 1.100000 -0.103724

obj/chalkboard/ChalkboardPoles.mtl

@@ -0,0 +1,12 @@
+# Blender MTL File: 'Chalkboard.blend'
+# Material Count: 1
+
+newmtl Scuffed_Aluminum
+Ns 323.999994
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2

obj/chalkboard/ChalkboardPoles.obj

@@ -1,6 +1,6 @@
 # Blender v2.83.20 OBJ File: 'Chalkboard.blend'
 # www.blender.org
-mtllib Chalkboard_one_with_Poles.mtl
+mtllib ChalkboardPoles.mtl
 o MetalPole_Left_Cube.002
 v -0.050000 0.000000 -0.058680
 v -0.050000 2.500000 -0.058680
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 f 13/27/10 14/28/10 10/18/10 9/17/10
 f 11/29/11 15/30/11 13/27/11 9/17/11
 f 16/23/12 12/22/12 10/31/12 14/32/12
-o Board_Left_Cube.007
-v -0.010000 0.100000 -0.103724
-v -0.010000 1.100000 -0.103724
-v -0.010000 0.100000 -3.103724
-v -0.010000 1.100000 -3.103724
-v 0.010000 0.100000 -0.103724
-v 0.010000 1.100000 -0.103724
-v 0.010000 0.100000 -3.103724
-v 0.010000 1.100000 -3.103724
-vt 0.375000 0.000000
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-vt 0.375000 0.750000
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-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl TestChalk.001
-s off
-f 17/33/13 18/34/13 20/35/13 19/36/13
-f 19/36/14 20/35/14 24/37/14 23/38/14
-f 23/38/15 24/37/15 22/39/15 21/40/15
-f 21/40/16 22/39/16 18/41/16 17/42/16
-f 19/43/17 23/38/17 21/40/17 17/44/17
-f 24/37/18 20/45/18 18/46/18 22/39/18

obj/laptop/Laptop.mtl

@@ -0,0 +1,13 @@
+# Blender MTL File: 'Laptop.blend'
+# Material Count: 1
+
+newmtl Material.003
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd Laptop.png

obj/laptop/Laptop.obj

@@ -0,0 +1,133 @@
+# Blender v2.83.20 OBJ File: 'Laptop.blend'
+# www.blender.org
+mtllib Laptop.mtl
+o Keyboard_Cube
+v -0.020000 0.006000 -0.580000
+v -0.020000 0.004000 -0.580000
+v -0.020000 0.006000 -0.020000
+v -0.020000 0.004000 -0.020000
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+f 6/16/6 5/2/6 1/1/6 2/13/6
+o UpperPart_Cube.001
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+vn 0.2588 -0.9659 0.0000
+vn 0.9659 0.2588 0.0000
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+s off
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+f 10/29/11 9/17/11 11/30/11 12/31/11
+f 14/32/12 13/18/12 9/17/12 10/29/12
+o LowerPart_Cube.002
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+s off
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+f 18/45/17 17/33/17 19/46/17 20/47/17
+f 22/48/18 21/34/18 17/33/18 18/45/18
+o Monitor_Plane
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+v -0.446411 0.334548 -0.020000
+v -0.363589 0.025452 -0.580000
+v -0.446411 0.334548 -0.580000
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+vt 0.935285 1.000000
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+usemtl Material.003
+s off
+f 25/49/19 26/50/19 28/51/19 27/52/19

obj/new/Chalkboard.mtl

@@ -1,34 +0,0 @@
-# Blender MTL File: 'Chalkboard.blend'
-# Material Count: 3
-
-newmtl Scuffed_Aluminum
-Ns 323.999994
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.000000 0.000000 0.000000
-Ni 1.000000
-d 1.000000
-illum 2
-
-newmtl TestChalk
-Ns 225.000000
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.000000 0.000000 0.000000
-Ni 1.450000
-d 1.000000
-illum 2
-map_Kd assets\\materials\\Chalkboard.jpg
-
-newmtl TestChalk.001
-Ns 225.000000
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.500000 0.500000 0.500000
-Ke 0.000000 0.000000 0.000000
-Ni 1.450000
-d 1.000000
-illum 2
-map_Kd assets\\materials\\Chalkboard.jpg

obj/new/Chalkboard.obj

@@ -1,233 +0,0 @@
-# Blender v2.83.20 OBJ File: 'Chalkboard.blend'
-# www.blender.org
-mtllib Chalkboard.mtl
-o MetalPole_Left_Cube.002
-v -0.050000 0.000000 -0.058680
-v -0.050000 2.500000 -0.058680
-v -0.050000 0.000000 -0.098680
-v -0.050000 2.500000 -0.098680
-v 0.050000 0.000000 -0.058680
-v 0.050000 2.500000 -0.058680
-v 0.050000 0.000000 -0.098680
-v 0.050000 2.500000 -0.098680
-vt 0.060000 0.060000
-vt 0.060000 0.940000
-vt 0.940000 0.940000
-vt 0.940000 0.060000
-vt 0.060000 0.060000
-vt 0.060000 0.940000
-vt 0.940000 0.940000
-vt 0.940000 0.060000
-vt 0.060000 0.940000
-vt 0.060000 0.060000
-vt 0.940000 0.060000
-vt 0.940000 0.940000
-vt 0.060000 0.940000
-vt 0.940000 0.940000
-vt 0.060000 0.060000
-vt 0.940000 0.060000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 0.0000 -1.0000
-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl Scuffed_Aluminum
-s off
-f 1/1/1 2/2/1 4/3/1 3/4/1
-f 3/5/2 4/6/2 8/7/2 7/8/2
-f 7/8/3 8/7/3 6/9/3 5/10/3
-f 5/11/4 6/12/4 2/2/4 1/1/4
-f 3/13/5 7/14/5 5/11/5 1/1/5
-f 8/7/6 4/6/6 2/15/6 6/16/6
-o MetalPole_MiddleLeft_Cube.003
-v -0.050000 0.000000 -3.099831
-v -0.050000 2.500000 -3.099831
-v -0.050000 0.000000 -3.139831
-v -0.050000 2.500000 -3.139831
-v 0.050000 0.000000 -3.099831
-v 0.050000 2.500000 -3.099831
-v 0.050000 0.000000 -3.139831
-v 0.050000 2.500000 -3.139831
-vt 0.060000 0.060000
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-vt 0.060000 0.940000
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-vt 0.060000 0.060000
-vt 0.940000 0.060000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 0.0000 -1.0000
-vn 1.0000 0.0000 0.0000
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obj/new/Chalkboard_one_with_Poles.mtl

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obj/new/StuhlAusgeklappt.mtl

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obj/new/StuhlAusgeklappt.obj

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obj/new/StuhlAusgeklappt_mit_Tisch.mtl

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obj/new/StuhlAusgeklappt_mit_Tisch.obj

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obj/new/StuhlEingeklappt.mtl

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obj/new/StuhlEingeklappt.obj

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obj/new/StuhlEingeklappt_mit_Tisch.mtl

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obj/new/StuhlEingeklappt_mit_Tisch.obj

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obj/new/Window.mtl

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obj/new/Window.obj

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-vt 1.336667 1.336667
-vt 1.336667 -0.336667
-vt -0.336667 1.336667
-vt -0.336667 -0.336667
-vt -0.336667 -0.336667
-vn 0.0000 1.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 -1.0000 0.0000
-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 -1.0000
-usemtl Architectural_glass
-s off
-f 1/1/1 5/2/1 7/3/1 3/4/1
-f 4/5/2 3/6/2 7/7/2 8/8/2
-f 8/8/3 7/7/3 5/9/3 6/10/3
-f 6/11/4 2/12/4 4/5/4 8/8/4
-f 2/13/5 1/1/5 3/14/5 4/15/5
-f 6/16/6 5/2/6 1/1/6 2/13/6
-o Border_RIGHT_Cube.001
-v -0.010000 -0.010000 0.010000
-v -0.010000 3.010000 0.010000
-v -0.010000 -0.010000 -0.010000
-v -0.010000 3.010000 -0.010000
-v 0.010000 -0.010000 0.010000
-v 0.010000 3.010000 0.010000
-v 0.010000 -0.010000 -0.010000
-v 0.010000 3.010000 -0.010000
-vt 0.375000 0.000000
-vt 0.625000 0.000000
-vt 0.625000 0.250000
-vt 0.375000 0.250000
-vt 0.625000 0.500000
-vt 0.375000 0.500000
-vt 0.625000 0.750000
-vt 0.375000 0.750000
-vt 0.625000 1.000000
-vt 0.375000 1.000000
-vt 0.125000 0.500000
-vt 0.125000 0.750000
-vt 0.875000 0.500000
-vt 0.875000 0.750000
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-vn 0.0000 0.0000 -1.0000
-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl Material.001
-s off
-f 9/17/7 10/18/7 12/19/7 11/20/7
-f 11/20/8 12/19/8 16/21/8 15/22/8
-f 15/22/9 16/21/9 14/23/9 13/24/9
-f 13/24/10 14/23/10 10/25/10 9/26/10
-f 11/27/11 15/22/11 13/24/11 9/28/11
-f 16/21/12 12/29/12 10/30/12 14/23/12
-o Border_BOTTOM_Cube.002
-v -0.010000 -0.010000 0.000000
-v -0.010000 0.010000 0.000000
-v -0.010000 -0.010000 -2.000000
-v -0.010000 0.010000 -2.000000
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-v 0.010000 -0.010000 -2.000000
-v 0.010000 0.010000 -2.000000
-vt 0.375000 0.000000
-vt 0.625000 0.000000
-vt 0.625000 0.250000
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-vt 0.625000 0.750000
-vt 0.375000 0.750000
-vt 0.625000 1.000000
-vt 0.375000 1.000000
-vt 0.125000 0.500000
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-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl Material.002
-s off
-f 17/31/13 18/32/13 20/33/13 19/34/13
-f 19/34/14 20/33/14 24/35/14 23/36/14
-f 23/36/15 24/35/15 22/37/15 21/38/15
-f 21/38/16 22/37/16 18/39/16 17/40/16
-f 19/41/17 23/36/17 21/38/17 17/42/17
-f 24/35/18 20/43/18 18/44/18 22/37/18
-o Border_TOP_Cube.003
-v -0.010000 2.990000 0.000000
-v -0.010000 3.010000 0.000000
-v -0.010000 2.990000 -2.000000
-v -0.010000 3.010000 -2.000000
-v 0.010000 2.990000 0.000000
-v 0.010000 3.010000 0.000000
-v 0.010000 2.990000 -2.000000
-v 0.010000 3.010000 -2.000000
-vt 0.375000 0.000000
-vt 0.625000 0.000000
-vt 0.625000 0.250000
-vt 0.375000 0.250000
-vt 0.625000 0.500000
-vt 0.375000 0.500000
-vt 0.625000 0.750000
-vt 0.375000 0.750000
-vt 0.625000 1.000000
-vt 0.375000 1.000000
-vt 0.125000 0.500000
-vt 0.125000 0.750000
-vt 0.875000 0.500000
-vt 0.875000 0.750000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 0.0000 -1.0000
-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl Material.003
-s off
-f 25/45/19 26/46/19 28/47/19 27/48/19
-f 27/48/20 28/47/20 32/49/20 31/50/20
-f 31/50/21 32/49/21 30/51/21 29/52/21
-f 29/52/22 30/51/22 26/53/22 25/54/22
-f 27/55/23 31/50/23 29/52/23 25/56/23
-f 32/49/24 28/57/24 26/58/24 30/51/24
-o Border_LEFT_Cube.004
-v -0.010000 -0.010000 -1.990000
-v -0.010000 3.010000 -1.990000
-v -0.010000 -0.010000 -2.010000
-v -0.010000 3.010000 -2.010000
-v 0.010000 -0.010000 -1.990000
-v 0.010000 3.010000 -1.990000
-v 0.010000 -0.010000 -2.010000
-v 0.010000 3.010000 -2.010000
-vt 0.375000 0.000000
-vt 0.625000 0.000000
-vt 0.625000 0.250000
-vt 0.375000 0.250000
-vt 0.625000 0.500000
-vt 0.375000 0.500000
-vt 0.625000 0.750000
-vt 0.375000 0.750000
-vt 0.625000 1.000000
-vt 0.375000 1.000000
-vt 0.125000 0.500000
-vt 0.125000 0.750000
-vt 0.875000 0.500000
-vt 0.875000 0.750000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 0.0000 -1.0000
-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl Material.004
-s off
-f 33/59/25 34/60/25 36/61/25 35/62/25
-f 35/62/26 36/61/26 40/63/26 39/64/26
-f 39/64/27 40/63/27 38/65/27 37/66/27
-f 37/66/28 38/65/28 34/67/28 33/68/28
-f 35/69/29 39/64/29 37/66/29 33/70/29
-f 40/63/30 36/71/30 34/72/30 38/65/30

obj/table/Table.mtl

@@ -0,0 +1,13 @@
+# Blender MTL File: 'Schreibtisch.blend'
+# Material Count: 1
+
+newmtl Material
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd C:\\Users\\Finn_\\Desktop\\Wood_Wool_Combined_Vertical_V2.png

obj/table/Table.obj

@@ -0,0 +1,159 @@
+# Blender v2.83.20 OBJ File: 'Schreibtisch.blend'
+# www.blender.org
+mtllib Table.mtl
+o Cube.002_Cube.004
+v -1.000000 0.710000 -0.000000
+v -1.000000 0.750000 -0.000000
+v -1.000000 0.710000 -2.000000
+v -1.000000 0.750000 -2.000000
+v -0.000000 0.710000 -0.000000
+v -0.000000 0.750000 -0.000000
+v -0.000000 0.710000 -2.000000
+v -0.000000 0.750000 -2.000000
+vt 0.000000 0.499848
+vt 0.000000 0.999848
+vt 1.000000 0.999848
+vt 1.000000 0.499848
+vt 0.000000 0.499848
+vt 0.000000 0.999848
+vt 1.000000 0.999848
+vt 1.000000 0.499848
+vt 0.000000 0.999848
+vt 0.000000 0.499848
+vt 1.000000 0.499848
+vt 1.000000 0.999848
+vt 0.000000 0.999848
+vt 1.000000 0.999848
+vt 0.000000 0.499848
+vt 1.000000 0.499848
+vn -1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+usemtl Material
+s off
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/8/3 8/7/3 6/9/3 5/10/3
+f 5/11/4 6/12/4 2/2/4 1/1/4
+f 3/13/5 7/14/5 5/11/5 1/1/5
+f 8/7/6 4/6/6 2/15/6 6/16/6
+o Cube_Cube.007
+v -1.000000 0.000000 -1.400000
+v -1.000000 0.710000 -1.400000
+v -1.000000 0.000000 -2.000000
+v -1.000000 0.710000 -2.000000
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+vn 0.0000 0.0000 1.0000
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+vn 0.0000 1.0000 0.0000
+usemtl Material
+s off
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+f 11/29/11 15/30/11 13/27/11 9/17/11
+f 16/23/12 12/22/12 10/31/12 14/32/12
+o Cube.001_Cube.008
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+v -0.040000 0.000000 -1.400000
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+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+usemtl Material
+s off
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+f 19/37/14 20/38/14 24/39/14 23/40/14
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+f 19/45/17 23/46/17 21/43/17 17/33/17
+f 24/39/18 20/38/18 18/47/18 22/48/18
+o Cube.003_Cube.009
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+v -1.000000 0.000000 -0.600000
+v -1.000000 0.710000 -0.600000
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+vt 1.000000 0.499770
+vn -1.0000 0.0000 0.0000
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+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+usemtl Material
+s off
+f 25/49/19 26/50/19 28/51/19 27/52/19
+f 27/53/20 28/54/20 32/55/20 31/56/20
+f 31/56/21 32/55/21 30/57/21 29/58/21
+f 29/59/22 30/60/22 26/50/22 25/49/22
+f 27/61/23 31/62/23 29/59/23 25/49/23
+f 32/55/24 28/54/24 26/63/24 30/64/24

scene-graph-example.scg

@@ -0,0 +1,84 @@
+# Kommentar
+
+# Definition eines Modells
+# Model hat eindeutige numerische ID
+# Durch diese ID kann ein Objekt dieses Modell verwenden
+model 0
+
+# Angabe der OBJ Datei
+file ../obj/cube.obj
+
+# Angabe der Textur Datei
+texture ../texture/crate.png
+
+
+# Definition eines Modells oder Objekts endet automatisch
+# bei beginn einer neuen Definition
+
+model 1
+file ../obj/earth.obj
+texture ../texture/pb.png
+
+
+# Definition eines Objekts
+# jedes Objekt braucht eindeutige numerische ID
+obj 0
+
+# Angabe welches Modell das Objekt nutzt
+# Kann im Fall von Gruppenobjekten weggelassen werden
+use 0
+
+# lesbarer Name des Objekts
+# eigentlich nur für debugging, muss wahrscheinlich
+# garnicht implementiert werden
+name myCrate1
+
+# Position des Objekts
+# relativ zur Position des Parent Elements
+translate 0.0 0.0 2.0
+
+# Skalierung des Objekts
+# relativ zur Skalierung des Parent Elements
+scale 1.0 1.0 1.0
+
+
+# rotationen
+rotateX 0.0
+rotateY 1.5
+rotateZ 0.0
+
+
+
+obj 1
+use 0
+name myCrate2
+translate 0.0 3.0 0.0
+scale 0.5 0.5 0.5
+# Definition des Parent Objekts
+parent 0
+
+
+obj 2
+use 1
+name Sonne
+#texture ../texture/pb.png
+translate 0.0 0.0 0.0
+scale 2.0 2.0 2.0
+
+
+obj 3
+use 1
+name Erde
+#texture ../texture/earth/day.png
+translate 4.0 0.0 0.0
+scale 1.0 1.0 1.0
+parent 2
+
+
+obj 4
+use 1
+name Mond
+#texture ../texture/checkerboard.png
+translate 2.0 0.0 0.0
+scale 0.5 0.5 0.5
+parent 3

src/main.c

@@ -12,9 +12,6 @@
 #include "wavefrontobj.h"
 #include "sceneGraph.h"
 
-#define STB_IMAGE_IMPLEMENTATION
-#include "../lib/stb_image.h"
-
 #include <stdlib.h>
 #include <math.h>
 #include <string.h>
@@ -32,17 +29,6 @@ GLuint program;
 
 int flipFlag = 1;
 
-GLuint textures[NUM_TEXTURES];
-char* textureFiles[NUM_TEXTURES] = {
-    "../texture/earth/day.png",
-    "../texture/earth/night.png",
-    "../texture/earth/clouds.png",
-    "../texture/earth/ocean_mask.png",
-    "../texture/earth/normal.png"
-};
-
-ObjectData* objectData;
-
 bool exitRequested = false;
 
 GLFWwindow* window;
@@ -65,15 +51,6 @@ mat4 viewingTransformation;
 // Define a global scene graph root node
 SceneNode* rootNode;
 
-
-int numModels = 0;
-char* models[] = {
-    "../obj/Xblock.obj",
-    "../obj/Yblock.obj",
-    "../obj/Yblock_rotated.obj",
-    "../obj/Zblock.obj",
-};
-
 /**
  * Input handler for camera movement.
  *  */ 
@@ -126,38 +103,9 @@ void keyboardHandler(GLFWwindow* window, int key, int scancode, int action, int
     }
 }
 
-/**
- * Loads textures.
- */
-void loadTexture(char* textureFile, GLuint* texture) {
-    int width, height, nrChannels;
-    unsigned char* image = stbi_load(textureFile, &width, &height, &nrChannels, 0);
-
-    // default: 3 channels, RGB
-
-    GLenum channelFormats[] = {
-        0,
-        GL_RED,
-        GL_RG, 
-        GL_RGB,
-        GL_RGBA
-    };
-    GLenum format = channelFormats[nrChannels];
-
-    glGenTextures(1, texture);
-    glBindTexture(GL_TEXTURE_2D, *texture);
-
-    printf("%s - %d\n", textureFile, nrChannels);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, format, GL_UNSIGNED_BYTE, image);
-    // load texture using previously determined format ----- ^^^^^^
-
-    glGenerateMipmap(GL_TEXTURE_2D);
-    glBindTexture(GL_TEXTURE_2D, 0);
-
-    stbi_image_free(image);
-}
-
 void renderNode(SceneNode* node) {
+    if (!node->model) return;
+
     mat4 modelView;
     identity(&modelView);
     multiply(&modelView, &node->worldTransformation, &modelView);
@@ -182,14 +130,14 @@ void renderNode(SceneNode* node) {
     textureLocation = glGetUniformLocation(program, "textureSampler");
     glUniform1i(textureLocation, 0);
     glActiveTexture(GL_TEXTURE0);
-    glBindTexture(GL_TEXTURE_2D, textures[DAY]);
+    glBindTexture(GL_TEXTURE_2D, node->model->texture);
 
-    textureLocation = glGetUniformLocation(program, "normalMap");
+    // textureLocation = glGetUniformLocation(program, "normalMap");
-    glUniform1i(textureLocation, 4);
+    // glUniform1i(textureLocation, 4);
-    glActiveTexture(GL_TEXTURE4);
+    // glActiveTexture(GL_TEXTURE4);
-    glBindTexture(GL_TEXTURE_2D, textures[NORMAL]);
+    // glBindTexture(GL_TEXTURE_2D, textures[NORMAL]);
 
-    draw_object(node->objectData);
+    draw_object(node->model->objectData);
 }
 
 void init(void) {
@@ -259,31 +207,12 @@ void init(void) {
         exit(1);
     }
 
-
-    // --------------- READ MODEL FILES
-    
-    //objectData = readObjFiles(&models, numModels);
-    char* c = "../obj/new/Window.obj";
-    objectData = readSingleObjFile(&c);
-
     stbi_set_flip_vertically_on_load(flipFlag);
-    // -------------- READ TEXTURE FILES
+    // --------------- READ SCENE GRAPH
-    for (int i = 0; i < NUM_TEXTURES; i++) {
-        loadTexture(textureFiles[i], &textures[i]);
-    }
-
     setNodeRenderFunction(&renderNode);
 
-    // Create the root scene node
+    // read scene graph
-    rootNode = createSceneNode();
+    rootNode = loadSceneGraphFromFile("../scene-graph.scg");
-
-    // Create a child node (e.g., for the model)
-    SceneNode* modelNode = createSceneNode();
-    modelNode->objectData = objectData;
-    addChild(rootNode, modelNode);
-
-    // Set transformations for the modelNode (example)
-    rotateY(&modelNode->transformation, &modelNode->transformation, pi / 4);
 
     // ENABLE BACKFACE CULLING
     glFrontFace(GL_CCW);
@@ -312,12 +241,14 @@ void draw(void) {
     timeSinceUpdate += deltaTime;
     glfwSetTime(0.0f);
 
+
     if (timeSinceUpdate >= timeBetweenUpdates) {
         updateStats();
         timeSinceUpdate = 0.0f;
         framesSinceUpdate = 0;
     }
 
+
     // camera movement
     handleInputs(deltaTime);
 
@@ -330,6 +261,10 @@ void draw(void) {
     if (step > 1.0f) step -= 1.0f;
     if (step < 0.0f) step += 1.0f;
 
+    //SceneNode* box3 = findNodeByName("box3", rootNode);
+    //rotateY(&box3->transformation, &box3->transformation, 0.001);
+    //updateSceneNode(rootNode, NULL);
+
     // step multiplied by pi * 2 for use in rotation and trig functions
     GLfloat stepi = step * pi * 2;
 
@@ -361,17 +296,10 @@ void draw(void) {
     glUniform4f(glGetUniformLocation(program, "lightColor"), 1.0f, 1.0f, 1.0f, 1.0f);
     glUniform4f(glGetUniformLocation(program, "ambientLight"), 0.05f, 0.05f, 0.05f, 1.0f);
 
-    // BIND TEXTURES
+    vec4 lightPosition = {cos(stepi) * 5.0f, 5.0f, sin(stepi) * 5.0f, 1.0f};
-    GLuint textureLocation;
+    multiplyAny((GLfloat*)&lightPosition, (GLfloat*)&viewingTransformation, (GLfloat*)&lightPosition, 4, 4, 1);
-    textureLocation = glGetUniformLocation(program, "textureSampler");
-    glUniform1i(textureLocation, 0);
-    glActiveTexture(GL_TEXTURE0);
-    glBindTexture(GL_TEXTURE_2D, textures[DAY]);
 
-    textureLocation = glGetUniformLocation(program, "normalMap");
+    glUniform3f(glGetUniformLocation(program, "lightPosition"), lightPosition.x, lightPosition.y, lightPosition.z);
-    glUniform1i(textureLocation, 4);
-    glActiveTexture(GL_TEXTURE4);
-    glBindTexture(GL_TEXTURE_2D, textures[NORMAL]);
 
 
     renderSceneNode(rootNode);

src/objectHandler.c

@@ -94,7 +94,7 @@ ObjectData* readObjFiles(char** path, int numModels, int* count) {
  * Takes a single object and reads it a certain number of times.
  * Returns an array of objects.
  */
-ObjectData* readSingleObjFile(char** path) {
+ObjectData* readSingleObjFile(char* path) {
 	ObjectData* objectData = (ObjectData*) malloc(sizeof(ObjectData));
 	
 	if (!objectData) {
@@ -103,7 +103,7 @@ ObjectData* readSingleObjFile(char** path) {
         return NULL;
     }
 
-    objectData->object = readObjFile(*path);
+    objectData->object = readObjFile(path);
 	load_object(objectData);
 
 	return objectData;

src/objectHandler.h

@@ -11,7 +11,7 @@ typedef struct {
 
 extern void load_object(ObjectData* objectData);
 extern ObjectData* readObjFiles(char** path, int numModels, int* count);
-extern ObjectData* readSingleObjFile(char** path);
+extern ObjectData* readSingleObjFile(char* path);
 extern void draw_object(ObjectData* objectData);
 
 #endif

src/sceneGraph.c

@@ -3,6 +3,32 @@
 #include "sceneGraph.h"
 #include "objectHandler.h"
 #include <stdlib.h>
+#include <math.h>
+#include <stdio.h>
+#include <GL/glew.h>
+#include <stdbool.h>
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "../lib/stb_image.h"
+
+#define SCG_LINE_BUFFER_SIZE 1024
+#define SCG_KEYWORD_BUFFER_SIZE 32
+
+#define KEYWORD_DEFINE_MODEL "model"
+#define KEYWORD_DEFINE_NODE "obj"
+
+#define KEYWORD_DEFINE_OBJ_FILE "file"
+#define KEYWORD_DEFINE_TEXTURE_FILE "texture"
+
+#define KEYWORD_USE_MODEL "use"
+#define KEYWORD_DEFINE_PARENT "parent"
+#define KEYWORD_DEFINE_NAME "name"
+
+#define KEYWORD_SCALE "scale"
+#define KEYWORD_TRANSLATE "translate"
+#define KEYWORD_ROTATE_X "rotateX"
+#define KEYWORD_ROTATE_Y "rotateY"
+#define KEYWORD_ROTATE_Z "rotateZ"
 
 void (*renderFunction)(SceneNode*);
 
@@ -10,13 +36,15 @@ void setNodeRenderFunction(void (*newRenderFunction)(SceneNode*)) {
     renderFunction = newRenderFunction;
 }
 
-SceneNode* createSceneNode() {
+SceneNode* createSceneNode(int id) {
     SceneNode* node = (SceneNode*)malloc(sizeof(SceneNode));
     identity(&node->transformation);
     identity(&node->worldTransformation);
+    node->id = id;
     node->children = NULL;
     node->numChildren = 0;
-    node->objectData = NULL;
+    node->model = NULL;
+    node->name = NULL;
     return node;
 }
 
@@ -27,14 +55,16 @@ void addChild(SceneNode* parent, SceneNode* child) {
 }
 
 void updateSceneNode(SceneNode* node, mat4* parentTransformation) {
+    if (parentTransformation) {
         multiply(&node->worldTransformation, parentTransformation, &node->transformation);
+    }
     for (int i = 0; i < node->numChildren; i++) {
         updateSceneNode(node->children[i], &node->worldTransformation);
     }
 }
 
 void renderSceneNode(SceneNode* node) {
-    if (node->objectData) {
+    if (node->model) {
         renderFunction(node);
     }
     for (int i = 0; i < node->numChildren; i++) {
@@ -49,3 +79,265 @@ void freeSceneNode(SceneNode* node) {
     free(node->children);
     free(node);
 }
+
+void loadTexture(char* textureFile, GLuint* texture) {
+    int width, height, nrChannels;
+    unsigned char* image = stbi_load(textureFile, &width, &height, &nrChannels, 0);
+
+    // default: 3 channels, RGB
+
+    GLenum channelFormats[] = {
+        0,
+        GL_RED,
+        GL_RG, 
+        GL_RGB,
+        GL_RGBA
+    };
+    GLenum format = channelFormats[nrChannels];
+
+    glGenTextures(1, texture);
+    glBindTexture(GL_TEXTURE_2D, *texture);
+
+    printf("%s - %d\n", textureFile, nrChannels);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, format, GL_UNSIGNED_BYTE, image);
+    // load texture using previously determined format ----- ^^^^^^
+
+    glGenerateMipmap(GL_TEXTURE_2D);
+    glBindTexture(GL_TEXTURE_2D, 0);
+
+    stbi_image_free(image);
+}
+
+
+SceneNode* findNode(int id, SceneNode* root) {
+    if (root->id == id) return root;
+    for (int i = 0; i < root->numChildren; i++) {
+        SceneNode* node = findNode(id, root->children[i]);
+        if (node) return node;
+    }
+    return NULL;
+}
+
+SceneNode* findNodeByName(char* name, SceneNode* root) {
+    if (root->name && strcmp(root->name, name) == 0) return root;
+    for (int i = 0; i < root->numChildren; i++) {
+        SceneNode* node = findNodeByName(name, root->children[i]);
+        if (node) return node;
+    }
+    return NULL;
+}
+
+void printSceneGraph(SceneNode* node, int level) {
+    for (int i = 0; i < level; i++) {
+        printf(" - ");
+    }
+    if (node->name) {
+        printf("%s\n", node->name);
+    } else {
+        printf("%d\n", node->id);
+    }
+    for (int i = 0; i < node->numChildren; i++) {
+        printSceneGraph(node->children[i], level + 1);
+    }
+}
+
+SceneNode* loadSceneGraphFromFile(char* path) {
+    FILE* fp = fopen(path, "r");
+    if (fp == NULL) {
+        fprintf(stderr, "File could not be opened: %s\n", path);
+    }
+
+    char buf[SCG_LINE_BUFFER_SIZE];
+    char keyword[SCG_KEYWORD_BUFFER_SIZE];
+
+    // generate keyword buffer format string using SCG_KEYWORD_BUFFER_SIZE
+    // when SCK_KEYWORD_BUFFER_SIZE is 32 keywordBufferFormat will contain "%32s"
+    // avoid buffer overflow while reading buffer while also allowing for dynamic buffer scaling
+    // there is probably a better solution for this but I couldn't find one :(
+    char* keywordBufferFormat = (char*)malloc(sizeof(char) * (4 + (int)log10((double)SCG_KEYWORD_BUFFER_SIZE)));
+    sprintf(keywordBufferFormat, "%%%ds", SCG_KEYWORD_BUFFER_SIZE);
+
+    SceneNode* root = createSceneNode(-1);
+    root->name = "ROOT";
+
+    int maxModelId = 0;
+    int maxObjId = 0;
+
+    while (fgets(buf, SCG_LINE_BUFFER_SIZE, fp)) {
+        if (buf[0] == '#') continue;
+        sscanf(buf, keywordBufferFormat, keyword);
+        // printf("%s\n", keyword);
+
+        if (strcmp(keyword, KEYWORD_DEFINE_MODEL) == 0) {
+            int modelId = 0;
+            sscanf(buf, KEYWORD_DEFINE_MODEL " %d", &modelId);
+            if (modelId > maxModelId) {
+                maxModelId = modelId;
+            }
+        }
+    }
+
+    Model* models = (Model*)malloc(sizeof(Model) * (maxModelId + 1));
+
+    int currentModel = 0;
+
+    SceneNode* currentNode = NULL;
+    bool currentNodeHasParent = false;
+
+    char filepathBuffer[1024];
+
+    rewind(fp);
+    int currentLine = 0;
+    while (fgets(buf, SCG_LINE_BUFFER_SIZE, fp)) {
+        currentLine++;
+        if (buf[0] == '#') continue;
+        if (buf[0] == '\r' || buf[0] == '\n' || buf[0] == '\0') continue;
+        sscanf(buf, keywordBufferFormat, keyword);
+
+        if (strcmp(keyword, KEYWORD_DEFINE_MODEL) == 0) {
+            sscanf(buf, KEYWORD_DEFINE_MODEL " %d", &currentModel);
+            continue;
+        }
+        if (strcmp(keyword, KEYWORD_DEFINE_OBJ_FILE) == 0) {
+            sscanf(buf, KEYWORD_DEFINE_OBJ_FILE " %s", filepathBuffer);
+            models[currentModel].objectData = readSingleObjFile(filepathBuffer);
+            continue;
+        }
+        if (strcmp(keyword, KEYWORD_DEFINE_TEXTURE_FILE) == 0) {
+            sscanf(buf, KEYWORD_DEFINE_TEXTURE_FILE " %s", filepathBuffer);
+            loadTexture(filepathBuffer, &models[currentModel].texture);
+            continue;
+        }
+
+
+        if (strcmp(keyword, KEYWORD_DEFINE_NODE) == 0) {
+
+            if (currentNode && !currentNodeHasParent) {
+                addChild(root, currentNode);
+            }
+
+            currentNode = NULL;
+            currentNodeHasParent = false;
+
+            int nodeId = 0;
+            sscanf(buf, KEYWORD_DEFINE_NODE " %d", &nodeId);
+            if (findNode(nodeId, root)) {
+                fprintf(stderr, "redeclaration of objet with id %d - line %d\n", nodeId, currentLine);
+                return NULL;
+            }
+            currentNode = createSceneNode(nodeId);
+            continue;
+        }
+        if (strcmp(keyword, KEYWORD_DEFINE_NAME) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected, can't assign name - line %d\n", currentLine);
+                return NULL;
+            }
+            sscanf(buf, KEYWORD_DEFINE_NAME " %s", filepathBuffer);
+            char* name = (char*)malloc(strlen(filepathBuffer) * sizeof(char) + 1);
+            strcpy(name, filepathBuffer);
+            currentNode->name = name;
+            continue;
+        }
+
+        if (strcmp(keyword, KEYWORD_DEFINE_PARENT) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected, can't assign parent - line %d\n", currentLine);
+                return NULL;
+            }
+            if (currentNodeHasParent) {
+                fprintf(stderr, "selected node already has parent - line %d\n", currentLine);
+                return NULL;
+            }
+
+            int parentId = 0;
+            sscanf(buf, KEYWORD_DEFINE_PARENT " %d", &parentId);
+
+            SceneNode* parent = findNode(parentId, root);
+            if (!parent) {
+                fprintf(stderr, "parent node with id %d not found - line %d\n", parentId, currentLine);
+                return NULL;
+            }
+
+            addChild(parent, currentNode);
+            currentNodeHasParent = true;
+
+            continue;
+        }
+
+        if (strcmp(keyword, KEYWORD_USE_MODEL) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected to assign model to - line %d\n", currentLine);
+                return NULL;
+            }
+
+            int usedModel = 0;
+            sscanf(buf, KEYWORD_USE_MODEL " %d", &usedModel);
+
+            if (usedModel > maxModelId || usedModel < 0) {
+                fprintf(stderr, "model with id %d not found - line %d\n", usedModel, currentLine);
+                return NULL;
+            }
+
+            currentNode->model = &models[usedModel];
+        }
+
+        if (strcmp(keyword, KEYWORD_TRANSLATE) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected to assign position to - line %d\n", currentLine);
+                return NULL;
+            }
+            vec3 translation;
+            sscanf(buf, KEYWORD_TRANSLATE " %f %f %f", &translation.x, &translation.y, &translation.z);
+            translate(&currentNode->transformation, &currentNode->transformation, &translation);
+        }
+
+        if (strcmp(keyword, KEYWORD_SCALE) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected to assign scale to - line %d\n", currentLine);
+                return NULL;
+            }
+            vec3 translation;
+            sscanf(buf, KEYWORD_SCALE " %f %f %f", &translation.x, &translation.y, &translation.z);
+            scale(&currentNode->transformation, &currentNode->transformation, &translation);
+        }
+
+        if (strcmp(keyword, KEYWORD_ROTATE_X) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected to assign rotationX to - line %d\n", currentLine);
+                return NULL;
+            }
+            GLfloat angle;
+            sscanf(buf, KEYWORD_ROTATE_X " %f", &angle);
+            rotateX(&currentNode->transformation, &currentNode->transformation, angle);
+        }
+        if (strcmp(keyword, KEYWORD_ROTATE_Y) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected to assign rotationY to - line %d\n", currentLine);
+                return NULL;
+            }
+            GLfloat angle;
+            sscanf(buf, KEYWORD_ROTATE_Y " %f", &angle);
+            rotateY(&currentNode->transformation, &currentNode->transformation, angle);
+        }
+        if (strcmp(keyword, KEYWORD_ROTATE_Z) == 0) {
+            if (!currentNode) {
+                fprintf(stderr, "no node selected to assign rotationZ to - line %d\n", currentLine);
+                return NULL;
+            }
+            GLfloat angle;
+            sscanf(buf, KEYWORD_ROTATE_Z " %f", &angle);
+            rotateZ(&currentNode->transformation, &currentNode->transformation, angle);
+        }
+    }
+
+    if (currentNode && !currentNodeHasParent) {
+        addChild(root, currentNode);
+    }
+
+    updateSceneNode(root, NULL);
+
+    printSceneGraph(root, 0);
+
+    return root;
+}

src/sceneGraph.h

@@ -11,20 +11,30 @@
 
 typedef struct SceneNode SceneNode;
 
+typedef struct {
+    ObjectData* objectData;
+    GLuint texture;
+} Model;
+
 struct SceneNode {
+    int id;
     mat4 transformation; // Local transformation matrix
     mat4 worldTransformation; // World transformation matrix
     SceneNode** children; // Array of pointers to child nodes
     int numChildren; // Number of child nodes
-    ObjectData* objectData;
+    Model* model;
-
+    char* name;
 };
 
-void setNodeRenderFunction(void (*newRenderFunction)(SceneNode*));
+extern SceneNode* findNode(int id, SceneNode* root);
+extern SceneNode* findNodeByName(char* name, SceneNode* root);
+extern void setNodeRenderFunction(void (*newRenderFunction)(SceneNode*));
 extern SceneNode* createSceneNode();
 extern void addChild(SceneNode* parent, SceneNode* child);
 extern void updateSceneNode(SceneNode* node, mat4* parentTransformation);
 extern void renderSceneNode(SceneNode* node);
 extern void freeSceneNode(SceneNode* node);
+extern void printSceneGraph(SceneNode* root, int level);
+extern SceneNode* loadSceneGraphFromFile(char* path);
 
 #endif

test-scene-graph.scg

@@ -0,0 +1,38 @@
+model 0
+file ../obj/cube.obj
+texture ../texture/crate/texture.jpg
+
+obj 0
+use 0
+scale 1.0 0.3 1.0
+name box1
+
+obj 1
+parent 0
+translate 2.0 0.0 0.0
+
+obj 2
+use 0
+parent 1
+scale 0.7 1.5 0.7
+name box2
+
+obj 3
+parent 2
+translate 2.0 0.0 0.0
+
+obj 4
+use 0
+parent 3
+scale 0.7 1.5 0.7
+name box3
+
+obj 5
+parent 4
+translate 2.0 0.0 0.0
+
+obj 6
+use 0
+parent 5
+scale 0.7 1.5 0.7
+name box4