def drawBody(self, pos, quat, radius=1, keepDrawing=True, numVertices=16): """ this draws the body of the tree. This draws a ring of vertices and connects the rings with triangles to from the body. the keepDrawing parameter tells the function whether or not we're at an end if the vertices before were an end, don't draw branches to it """ vdata = self.bodydata circleGeom = Geom(vdata) vertWriter = GeomVertexWriter(vdata, "vertex") normalWriter = GeomVertexWriter(vdata, "normal") texReWriter = GeomVertexRewriter(vdata, "texcoord") startRow = vdata.getNumRows() vertWriter.setRow(startRow) normalWriter.setRow(startRow) sCoord = 0 if (startRow != 0): texReWriter.setRow(startRow - numVertices) sCoord = texReWriter.getData2f().getX() + 1 draw = (startRow - numVertices) in self.drawFlags if not draw: sCoord -= 1 drawIndex = startRow texReWriter.setRow(startRow) angleSlice = 2 * math.pi / numVertices currAngle = 0 perp1 = quat.getRight() perp2 = quat.getForward() #vertex information is written here for i in xrange(numVertices + 1): #doubles the last vertex to fix UV seam adjCircle = pos + (perp1 * math.cos(currAngle) + perp2 * math.sin(currAngle)) * radius normal = perp1 * math.cos(currAngle) + perp2 * math.sin(currAngle) normalWriter.addData3f(normal) vertWriter.addData3f(adjCircle) texReWriter.addData2f(1.0 * i / numVertices, sCoord) if keepDrawing: self.drawFlags.add(drawIndex) drawIndex += 1 currAngle += angleSlice draw = (startRow - numVertices) in self.drawFlags #we cant draw quads directly so we use Tristrips if (startRow != 0) and draw: lines = GeomTristrips(Geom.UHStatic) for i in xrange(numVertices + 1): lines.addVertex(i + startRow) lines.addVertex(i + startRow - numVertices - 1) lines.addVertex(startRow) lines.addVertex(startRow - numVertices) lines.closePrimitive() #lines.decompose() circleGeom.addPrimitive(lines) circleGeomNode = GeomNode("Debug") circleGeomNode.addGeom(circleGeom) self.numPrimitives += numVertices * 2 self.bodies.attachNewNode(circleGeomNode)
def drawBody(nodePath, vdata, pos, vecList, radius=1, keepDrawing=True, numVertices=8): circleGeom = Geom(vdata) vertWriter = GeomVertexWriter(vdata, "vertex") colorWriter = GeomVertexWriter(vdata, "color") normalWriter = GeomVertexWriter(vdata, "normal") drawReWriter = GeomVertexRewriter(vdata, "drawFlag") texReWriter = GeomVertexRewriter(vdata, "texcoord") startRow = vdata.getNumRows() vertWriter.setRow(startRow) colorWriter.setRow(startRow) normalWriter.setRow(startRow) sCoord = 0 if (startRow != 0): texReWriter.setRow(startRow - numVertices) sCoord = texReWriter.getData2f().getX() + 1 drawReWriter.setRow(startRow - numVertices) if (drawReWriter.getData1f() == False): sCoord -= 1 drawReWriter.setRow(startRow) texReWriter.setRow(startRow) angleSlice = 2 * math.pi / numVertices currAngle = 0 #axisAdj=LMatrix4.rotateMat(45, axis)*LMatrix4.scaleMat(radius)*LMatrix4.translateMat(pos) perp1 = vecList[1] perp2 = vecList[2] # vertex information is written here for i in range(numVertices): adjCircle = pos + \ (perp1 * math.cos(currAngle) + perp2 * math.sin(currAngle)) * \ radius normal = perp1 * math.cos(currAngle) + perp2 * math.sin(currAngle) normalWriter.addData3f(normal) vertWriter.addData3f(adjCircle) texReWriter.addData2f(sCoord, (i + 0.001) / (numVertices - 1)) colorWriter.addData4f(0.5, 0.5, 0.5, 1) drawReWriter.addData1f(keepDrawing) currAngle += angleSlice if startRow == 0: return drawReader = GeomVertexReader(vdata, "drawFlag") drawReader.setRow(startRow - numVertices) # we cant draw quads directly so we use Tristrips if drawReader.getData1i() != 0: lines = GeomTristrips(Geom.UHStatic) half = int(numVertices * 0.5) for i in range(numVertices): lines.addVertex(i + startRow) if i < half: lines.addVertex(i + startRow - half) else: lines.addVertex(i + startRow - half - numVertices) lines.addVertex(startRow) lines.addVertex(startRow - half) lines.closePrimitive() lines.decompose() circleGeom.addPrimitive(lines) circleGeomNode = GeomNode("Debug") circleGeomNode.addGeom(circleGeom) # I accidentally made the front-face face inwards. Make reverse makes the tree render properly and # should cause any surprises to any poor programmer that tries to use # this code circleGeomNode.setAttrib(CullFaceAttrib.makeReverse(), 1) global numPrimitives numPrimitives += numVertices * 2 nodePath.attachNewNode(circleGeomNode)
def drawBody(nodePath, vdata, pos, vecList, radius=1, keepDrawing=True, numVertices=8): circleGeom = Geom(vdata) vertWriter = GeomVertexWriter(vdata, "vertex") colorWriter = GeomVertexWriter(vdata, "color") normalWriter = GeomVertexWriter(vdata, "normal") drawReWriter = GeomVertexRewriter(vdata, "drawFlag") texReWriter = GeomVertexRewriter(vdata, "texcoord") startRow = vdata.getNumRows() vertWriter.setRow(startRow) colorWriter.setRow(startRow) normalWriter.setRow(startRow) sCoord = 0 if (startRow != 0): texReWriter.setRow(startRow - numVertices) sCoord = texReWriter.getData2f().getX() + 1 drawReWriter.setRow(startRow - numVertices) if(drawReWriter.getData1f() == False): sCoord -= 1 drawReWriter.setRow(startRow) texReWriter.setRow(startRow) angleSlice = 2 * math.pi / numVertices currAngle = 0 #axisAdj=LMatrix4.rotateMat(45, axis)*LMatrix4.scaleMat(radius)*LMatrix4.translateMat(pos) perp1 = vecList[1] perp2 = vecList[2] # vertex information is written here for i in range(numVertices): adjCircle = pos + \ (perp1 * math.cos(currAngle) + perp2 * math.sin(currAngle)) * \ radius normal = perp1 * math.cos(currAngle) + perp2 * math.sin(currAngle) normalWriter.addData3f(normal) vertWriter.addData3f(adjCircle) texReWriter.addData2f(sCoord, (i + 0.001) / (numVertices - 1)) colorWriter.addData4f(0.5, 0.5, 0.5, 1) drawReWriter.addData1f(keepDrawing) currAngle += angleSlice drawReader = GeomVertexReader(vdata, "drawFlag") drawReader.setRow(startRow - numVertices) # we cant draw quads directly so we use Tristrips if (startRow != 0) & (drawReader.getData1f() != False): lines = GeomTristrips(Geom.UHStatic) half = int(numVertices * 0.5) for i in range(numVertices): lines.addVertex(i + startRow) if i < half: lines.addVertex(i + startRow - half) else: lines.addVertex(i + startRow - half - numVertices) lines.addVertex(startRow) lines.addVertex(startRow - half) lines.closePrimitive() lines.decompose() circleGeom.addPrimitive(lines) circleGeomNode = GeomNode("Debug") circleGeomNode.addGeom(circleGeom) # I accidentally made the front-face face inwards. Make reverse makes the tree render properly and # should cause any surprises to any poor programmer that tries to use # this code circleGeomNode.setAttrib(CullFaceAttrib.makeReverse(), 1) global numPrimitives numPrimitives += numVertices * 2 nodePath.attachNewNode(circleGeomNode)