Removed shaders, textures are now supported

assets/shaders/shader.frag

@@ -10,5 +10,6 @@ void main() {
     vec3 ambientFactor = ambientLight;
     vec3 lambertFactor = max(vec3(0.0,0.0,0.0), dot(directionnalLight, fNormal) * directionnalLightFactor);
 
+    vec4 texel = texture2D(tex, gl_TexCoord[0].xy);
     gl_FragColor = vec4(ambientFactor + lambertFactor, 1.0);
 }

assets/shaders/shader.vert

@@ -1,6 +1,8 @@
 varying vec3 fNormal;
+varying vec4 fTexCoord;
 
 void main() {
     fNormal = gl_Normal;
     gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+    gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
 }

d3/model/basemodel.py

@@ -4,6 +4,8 @@ from math import sqrt
 
 from ..geometry import Vector
 
+from .mesh import Material, MeshPart
+
 Vertex = Vector
 Normal = Vertex
 TexCoord = Vertex
@@ -43,22 +45,14 @@ class Face:
         self.c = FaceVertex().from_array(arr[2])
         return self
 
-class Material:
-    def __init__(self, name):
-        self.name = name
-        self.Ka = None
-        self.Kd = None
-        self.Ks = None
-        self.map_Kd = None
-
-
 class ModelParser:
 
     def __init__(self):
         self.vertices = []
         self.normals = []
         self.tex_coords = []
-        self.faces = []
+        self.parts = []
+        self.current_part = None
         self.bounding_box = BoundingBox()
         self.center_and_scale = True
         self.vertex_vbo = None
@@ -66,6 +60,10 @@ class ModelParser:
         self.normal_vbo = None
         self.path = None
 
+    def init_textures(self):
+        for part in self.parts:
+            part.init_texture()
+
     def add_vertex(self, vertex):
         self.vertices.append(vertex)
         self.bounding_box.add(vertex)
@@ -77,7 +75,12 @@ class ModelParser:
         self.normals.append(normal)
 
     def add_face(self, face):
-        self.faces.append(face)
+        if self.current_part is None or face.material != self.current_part.material:
+            self.current_part = MeshPart(self)
+            self.current_part.material = face.material
+            self.parts.append(self.current_part)
+
+        self.current_part.add_face(face)
 
     def parse_line(self, string):
         pass
@@ -90,11 +93,8 @@ class ModelParser:
                 self.parse_line(line)
 
     def draw(self):
-
         import OpenGL.GL as gl
 
-        gl.glColor3f(1.0,0.0,0.0)
-
         if self.center_and_scale:
             center = self.bounding_box.get_center()
             scale = self.bounding_box.get_scale() / 2
@@ -102,104 +102,43 @@ class ModelParser:
             gl.glScalef(1/scale, 1/scale, 1/scale)
             gl.glTranslatef(-center.x, -center.y, -center.z)
 
-        if self.vertex_vbo is not None:
+        for part in self.parts:
-
+            part.draw()
-            self.vertex_vbo.bind()
-            gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
-            gl.glVertexPointerf(self.vertex_vbo)
-            self.vertex_vbo.unbind()
-
-            self.normal_vbo.bind()
-            gl.glEnableClientState(gl.GL_NORMAL_ARRAY);
-            gl.glNormalPointerf(self.normal_vbo)
-            self.normal_vbo.unbind()
-
-            gl.glDrawArrays(gl.GL_TRIANGLES, 0, len(self.vertex_vbo.data) * 9)
-
-        else:
-
-            gl.glBegin(gl.GL_TRIANGLES)
-            for face in self.faces:
-                v1 = self.vertices[face.a.vertex]
-                v2 = self.vertices[face.b.vertex]
-                v3 = self.vertices[face.c.vertex]
-
-                if face.a.normal is not None:
-                    n1 = self.normals[face.a.normal]
-                    n2 = self.normals[face.b.normal]
-                    n3 = self.normals[face.c.normal]
-
-                if face.a.normal is not None:
-                    gl.glNormal3f(n1.x, n1.y, n1.z)
-                gl.glVertex3f(v1.x, v1.y, v1.z)
-
-                if face.b.normal is not None:
-                    gl.glNormal3f(n2.x, n2.y, n2.z)
-                gl.glVertex3f(v2.x, v2.y, v2.z)
-
-                if face.c.normal is not None:
-                    gl.glNormal3f(n3.x, n3.y, n3.z)
-                gl.glVertex3f(v3.x, v3.y, v3.z)
-
-            gl.glEnd()
 
         if self.center_and_scale:
             gl.glPopMatrix()
 
     def generate_vbos(self):
-        from OpenGL.arrays import vbo
+        for part in self.parts:
-        from numpy import array
+            part.generate_vbos()
-        # Build VBO
-        v = []
-        n = []
-        t = []
-
-        for face in self.faces:
-            v1 = self.vertices[face.a.vertex]
-            v2 = self.vertices[face.b.vertex]
-            v3 = self.vertices[face.c.vertex]
-            v += [[v1.x, v1.y, v1.z], [v2.x, v2.y, v2.z], [v3.x, v3.y, v3.z]]
-
-            if face.a.normal is not None:
-                n1 = self.normals[face.a.normal]
-                n2 = self.normals[face.b.normal]
-                n3 = self.normals[face.c.normal]
-                n += [[n1.x, n1.y, n1.z], [n2.x, n2.y, n2.z], [n3.x, n3.y, n3.z]]
-
-            if face.a.tex_coord is not None:
-                t1 = self.tex_coords[face.a.tex_coord]
-                t2 = self.tex_coords[face.b.tex_coord]
-                t3 = self.tex_coords[face.c.tex_coord]
-                t += [[t1.x, t1.y], [t2.x, t2.y], [t3.x, t3.y]]
-
-        self.vertex_vbo  = vbo.VBO(array(v, 'f'))
-        self.normal_vbo  = vbo.VBO(array(n, 'f'))
-        self.texture_vbo = vbo.VBO(array(t, 'f'))
 
     def generate_vertex_normals(self):
+
         self.normals = [Normal() for i in self.vertices]
 
-        for face in self.faces:
+        for part in self.parts:
-            v1 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.b.vertex])
+            for face in part.faces:
-            v2 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.c.vertex])
+                v1 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.b.vertex])
-            cross = Vertex.cross_product(v1, v2)
+                v2 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.c.vertex])
-            self.normals[face.a.vertex] += cross
+                cross = Vertex.cross_product(v1, v2)
-            self.normals[face.b.vertex] += cross
+                self.normals[face.a.vertex] += cross
-            self.normals[face.c.vertex] += cross
+                self.normals[face.b.vertex] += cross
+                self.normals[face.c.vertex] += cross
 
         for normal in self.normals:
             normal.normalize()
 
-        for face in self.faces:
+        for part in self.parts:
-            face.a.normal = face.a.vertex
+            for face in part.faces:
-            face.b.normal = face.b.vertex
+                face.a.normal = face.a.vertex
-            face.c.normal = face.c.vertex
+                face.b.normal = face.b.vertex
+                face.c.normal = face.c.vertex
 
     def generate_face_normals(self):
 
-        self.normals = [Normal() for i in self.faces]
+        self.normals = [Normal() for i in sum(list(map(lambda x: len(x), self.faces)))]
 
-        for (index, face) in enumerate(self.faces):
+        for (index, face) in enumerate(sum(self.faces, [])):
 
             v1 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.b.vertex])
             v2 = Vertex.from_points(self.vertices[face.a.vertex], self.vertices[face.c.vertex])

d3/model/mesh.py

@@ -0,0 +1,173 @@
+#!/usr/bin/env python
+
+class Material:
+    def __init__(self, name):
+        self.name = name
+        self.Ka = None
+        self.Kd = None
+        self.Ks = None
+        self.map_Kd = None
+        self.id = None
+
+    def init_texture(self):
+
+        import OpenGL.GL as gl
+
+        # Already initialized
+        if self.id is not None:
+            return
+
+        # If no map_Kd, nothing to do
+        if self.map_Kd is None:
+            return
+
+        try:
+            ix, iy, image = self.map_Kd.size[0], self.map_Kd.size[1], self.map_Kd.tobytes("raw", "RGBA", 0, -1)
+        except SystemError:
+            ix, iy, image = self.map_Kd.size[0], self.map_Kd.size[1], self.map_Kd.tobytes("raw", "RGBX", 0, -1)
+
+        self.id = gl.glGenTextures(1)
+
+        gl.glBindTexture(gl.GL_TEXTURE_2D, self.id)
+        gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT,1)
+
+        gl.glTexImage2D(
+            gl.GL_TEXTURE_2D, 0, 3, ix, iy, 0,
+            gl.GL_RGBA, gl.GL_UNSIGNED_BYTE, image
+        )
+
+    def bind(self):
+        from OpenGL import GL as gl
+
+        gl.glEnable(gl.GL_TEXTURE_2D)
+        gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_NEAREST)
+        gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_NEAREST)
+        gl.glTexEnvf(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_DECAL)
+        gl.glBindTexture(gl.GL_TEXTURE_2D, self.id)
+
+    def unbind(self):
+        pass
+
+
+class MeshPart:
+    def __init__(self, parent):
+        self.parent = parent
+        self.material = None
+        self.vertex_vbo = None
+        self.tex_coord_vbo = None
+        self.normal_vbo = None
+        self.faces = []
+
+    def init_texture(self):
+        if self.material is not None:
+            self.material.init_texture()
+
+    def add_face(self, face):
+        self.faces.append(face)
+
+    def generate_vbos(self):
+
+        from OpenGL.arrays import vbo
+        from numpy import array
+
+        # Build VBO
+        v = []
+        n = []
+        t = []
+
+        for face in self.faces:
+            v1 = self.parent.vertices[face.a.vertex]
+            v2 = self.parent.vertices[face.b.vertex]
+            v3 = self.parent.vertices[face.c.vertex]
+            v += [[v1.x, v1.y, v1.z], [v2.x, v2.y, v2.z], [v3.x, v3.y, v3.z]]
+
+            if face.a.normal is not None:
+                n1 = self.parent.normals[face.a.normal]
+                n2 = self.parent.normals[face.b.normal]
+                n3 = self.parent.normals[face.c.normal]
+                n += [[n1.x, n1.y, n1.z], [n2.x, n2.y, n2.z], [n3.x, n3.y, n3.z]]
+
+            if face.a.tex_coord is not None:
+                t1 = self.parent.tex_coords[face.a.tex_coord]
+                t2 = self.parent.tex_coords[face.b.tex_coord]
+                t3 = self.parent.tex_coords[face.c.tex_coord]
+                t += [[t1.x, t1.y], [t2.x, t2.y], [t3.x, t3.y]]
+
+        self.vertex_vbo  = vbo.VBO(array(v, 'f'))
+
+        if len(n) > 0:
+            self.normal_vbo  = vbo.VBO(array(n, 'f'))
+
+        if len(t) > 0:
+            self.tex_coord_vbo = vbo.VBO(array(t, 'f'))
+
+    def draw(self):
+
+        if self.material is not None:
+            self.material.bind()
+
+        if self.vertex_vbo is not None:
+            self.draw_from_vbos()
+        else:
+            self.draw_from_arrays()
+
+        if self.material is not None:
+            self.material.unbind()
+
+    def draw_from_vbos(self):
+
+        import OpenGL.GL as gl
+
+        self.vertex_vbo.bind()
+        gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
+        gl.glVertexPointerf(self.vertex_vbo)
+        self.vertex_vbo.unbind()
+
+        if self.normal_vbo is not None:
+            self.normal_vbo.bind()
+            gl.glEnableClientState(gl.GL_NORMAL_ARRAY)
+            gl.glNormalPointerf(self.normal_vbo)
+            self.normal_vbo.unbind()
+
+        if self.tex_coord_vbo is not None:
+
+            if self.material is not None:
+                self.material.bind()
+
+            self.tex_coord_vbo.bind()
+            gl.glEnableClientState(gl.GL_TEXTURE_COORD_ARRAY)
+            gl.glTexCoordPointerf(self.tex_coord_vbo)
+            self.tex_coord_vbo.unbind()
+
+        gl.glDrawArrays(gl.GL_TRIANGLES, 0, len(self.vertex_vbo.data) * 9)
+
+    def draw_from_arrays(self):
+        pass
+
+class Mesh:
+    def __init__(self):
+        self.vertices = []
+        self.tex_coords = []
+        self.normals = []
+        self.parts = []
+        self.current_material = None
+        self.current_part = None
+
+    def draw(self):
+        for part in self.parts:
+            part.draw()
+
+    def add_face(self, face):
+        if self.current_part is None or face.material != self.current_part.material:
+            self.current_part = MeshPart(self)
+            self.current_part.material = face.material
+            self.parts.append(self.current_part)
+
+        self.current_part.add_face(face)
+
+    def generate_vbos(self):
+        for part in self.parts:
+            part.generate_vbos()
+
+
+

d3/model/obj.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
-from .basemodel import ModelParser, Exporter, Vertex, TexCoord, Normal, FaceVertex, Face, Material
+from .basemodel import ModelParser, Exporter, Vertex, TexCoord, Normal, FaceVertex, Face
+from .mesh import Material, MeshPart
 from functools import reduce
 import os.path
 import PIL.Image
@@ -24,7 +25,7 @@ class OBJParser(ModelParser):
         split = split[1:]
 
         if first == 'usemtl':
-            self.current_material = split[0]
+            self.current_material = self.mtl[split[0]]
         elif first == 'mtllib':
             path = os.path.join(os.path.dirname(self.path), split[0])
             self.mtl = MTLParser(self)
@@ -73,7 +74,7 @@ class MTLParser:
         elif first == 'Ks':
             self.current_mtl.Ks = Vertex().from_array(split)
         elif first == 'map_Kd':
-            self.map_Kd = PIL.Image.open(os.path.join(os.path.dirname(self.parent.path), split[0]))
+            self.current_mtl.map_Kd = PIL.Image.open(os.path.join(os.path.dirname(self.parent.path), split[0]))
 
 
     def parse_file(self, path):
@@ -82,6 +83,11 @@ class MTLParser:
                 line = line.rstrip()
                 self.parse_line(line)
 
+    def __getitem__(self, key):
+        for material in self.materials:
+            if material.name == key:
+                return material
+
 
 class OBJExporter(Exporter):
     def __init__(self, model):

d3/model/ply.py

@@ -82,6 +82,9 @@ class PLYExporter(Exporter):
         super().__init__(model)
 
     def __str__(self):
+
+        faces = sum([part.faces for part in self.model.parts], [])
+
         # Header
         string = "ply\nformat ascii 1.0\ncomment Automatically gnerated by model-converter\n"
 
@@ -90,7 +93,7 @@ class PLYExporter(Exporter):
         string += "property float32 x\nproperty float32 y\nproperty float32 z\n"
 
         # Types : faces
-        string += "element face " + str(len(self.model.faces)) + "\n"
+        string += "element face " + str(len(faces)) + "\n"
         string += "property list uint8 int32 vertex_indices\n"
 
         # End header
@@ -100,7 +103,7 @@ class PLYExporter(Exporter):
         for vertex in self.model.vertices:
             string += str(vertex.x) + " " + str(vertex.y) + " " + str(vertex.z) + "\n"
 
-        for face in self.model.faces:
+        for face in faces:
             string += "3 " + str(face.a.vertex) + " " + str(face.b.vertex) + " " + str(face.c.vertex) + "\n"
 
         return string

viewer.py

@@ -43,9 +43,10 @@ def main(args):
     running = True
 
     model = load_model(args.input)
+    model.init_textures()
     model.generate_vbos()
 
-    shader = DefaultShader()
+    # shader = DefaultShader()
 
     while running:
         for event in pg.event.get():
@@ -72,9 +73,9 @@ def main(args):
 
         gl.glPushMatrix()
         controls.apply()
-        shader.bind()
+        # shader.bind()
         model.draw()
-        shader.unbind()
+        # shader.unbind()
         gl.glPopMatrix()
 
         gl.glFlush()