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Bounding boxes are now drawn using Vertex arrays

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Cyberarm
2018-07-30 12:52:35 -05:00
parent ded012a9e0
commit 67b06b0001
7 changed files with 195 additions and 78 deletions
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213
lib/objects/game_object.rb
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@@ -4,6 +4,7 @@ class IMICFPS
# A game object is any renderable thing
class GameObject
include OpenGL
include GLU
include CommonMethods
attr_accessor :x, :y, :z, :scale
attr_accessor :visible, :renderable, :backface_culling
@@ -110,73 +111,159 @@ class IMICFPS
end
def render_bounding_box(box, color = @debug_color)
# TODO: Minimize number of calls in here
box = normalize_bounding_box(box)
glEnableClientState(GL_VERTEX_ARRAY)
glEnableClientState(GL_COLOR_ARRAY)
glEnableClientState(GL_NORMAL_ARRAY)
_normals = [
0,1,0,
0,1,0,
0,1,0,
0,1,0,
0,1,0,
0,1,0,
0,-1,0,
0,-1,0,
0,-1,0,
0,-1,0,
0,-1,0,
0,-1,0,
0,0,1,
0,0,1,
0,0,1,
0,0,1,
0,0,1,
0,0,1,
1,0,0,
1,0,0,
1,0,0,
1,0,0,
1,0,0,
1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0,
-1,0,0
].pack("f*")
_colors = [
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue,
color.red, color.green, color.blue
].pack("f*")
_vertices = [
box.min_x, box.max_y, box.max_z,
box.min_x, box.max_y, box.min_z,
box.max_x, box.max_y, box.min_z,
box.min_x, box.max_y, box.max_z,
box.max_x, box.max_y, box.max_z,
box.max_x, box.max_y, box.min_z,
box.max_x, box.min_y, box.min_z,
box.max_x, box.min_y, box.max_z,
box.min_x, box.min_y, box.max_z,
box.max_x, box.min_y, box.min_z,
box.min_x, box.min_y, box.min_z,
box.min_x, box.min_y, box.max_z,
box.min_x, box.max_y, box.max_z,
box.min_x, box.max_y, box.min_z,
box.min_x, box.min_y, box.min_z,
box.min_x, box.min_y, box.max_z,
box.min_x, box.min_y, box.min_z,
box.min_x, box.max_y, box.max_z,
box.max_x, box.max_y, box.max_z,
box.max_x, box.max_y, box.min_z,
box.max_x, box.min_y, box.min_z,
box.max_x, box.min_y, box.max_z,
box.max_x, box.min_y, box.min_z,
box.max_x, box.max_y, box.max_z,
box.min_x, box.max_y, box.max_z,
box.max_x, box.max_y, box.max_z,
box.max_x, box.min_y, box.max_z,
box.min_x, box.max_y, box.max_z,
box.max_x, box.min_y, box.max_z,
box.min_x, box.min_y, box.max_z,
box.max_x, box.min_y, box.min_z,
box.min_x, box.min_y, box.min_z,
box.min_x, box.max_y, box.min_z,
box.max_x, box.min_y, box.min_z,
box.min_x, box.max_y, box.min_z,
box.max_x, box.max_y, box.min_z
]
_vertices_size = _vertices.size
_vertices = _vertices.pack("f*")
glVertexPointer(3, GL_FLOAT, 0, _vertices)
glColorPointer(3, GL_FLOAT, 0, _colors)
glNormalPointer(GL_FLOAT, 0, _normals)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
glBegin(GL_TRIANGLES)
# TOP
glNormal3f(0,1,0)
glColor3f(color.red, color.green, color.blue)
glVertex3f(box.min_x, box.max_y, box.max_z)
glVertex3f(box.min_x, box.max_y, box.min_z)
glVertex3f(box.max_x, box.max_y, box.min_z)
glVertex3f(box.min_x, box.max_y, box.max_z)
glVertex3f(box.max_x, box.max_y, box.max_z)
glVertex3f(box.max_x, box.max_y, box.min_z)
# BOTTOM
glNormal3f(0,-1,0)
glVertex3f(box.max_x, box.min_y, box.min_z)
glVertex3f(box.max_x, box.min_y, box.max_z)
glVertex3f(box.min_x, box.min_y, box.max_z)
glVertex3f(box.max_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.min_y, box.max_z)
# RIGHT SIDE
glNormal3f(0,0,1)
glVertex3f(box.min_x, box.max_y, box.max_z)
glVertex3f(box.min_x, box.max_y, box.min_z)
glVertex3f(box.min_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.min_y, box.max_z)
glVertex3f(box.min_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.max_y, box.max_z)
# LEFT SIDE
glNormal3f(1,0,0)
glVertex3f(box.max_x, box.max_y, box.max_z)
glVertex3f(box.max_x, box.max_y, box.min_z)
glVertex3f(box.max_x, box.min_y, box.min_z)
glVertex3f(box.max_x, box.min_y, box.max_z)
glVertex3f(box.max_x, box.min_y, box.min_z)
glVertex3f(box.max_x, box.max_y, box.max_z)
# FRONT
glNormal3f(-1,0,0)
glVertex3f(box.min_x, box.max_y, box.max_z)
glVertex3f(box.max_x, box.max_y, box.max_z)
glVertex3f(box.max_x, box.min_y, box.max_z)
glVertex3f(box.min_x, box.max_y, box.max_z)
glVertex3f(box.max_x, box.min_y, box.max_z)
glVertex3f(box.min_x, box.min_y, box.max_z)
# BACK
glNormal3f(-1,0,0)
glVertex3f(box.max_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.max_y, box.min_z)
glVertex3f(box.max_x, box.min_y, box.min_z)
glVertex3f(box.min_x, box.max_y, box.min_z)
glVertex3f(box.max_x, box.max_y, box.min_z)
glEnd
glDisable(GL_LIGHTING)
glDrawArrays(GL_TRIANGLES, 0, _vertices_size/3)
glEnable(GL_LIGHTING)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
glDisableClientState(GL_VERTEX_ARRAY)
glDisableClientState(GL_COLOR_ARRAY)
glDisableClientState(GL_NORMAL_ARRAY)
end
def handleGlError