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Convert orbits to shaders.

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This commit is contained in:
Quantum 2018-08-28 20:34:10 -04:00
parent f5a2839fcf
commit 510dcb46a6
3 changed files with 27 additions and 19 deletions
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24
punyverse/entity.py
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@ -247,16 +247,26 @@ class Body(Entity):
return self.orbit_vbo
def _draw_orbits(self, distance):
with glRestore(GL_ENABLE_BIT | GL_LINE_BIT | GL_CURRENT_BIT):
glLoadMatrixf(self.parent.orbit_matrix)
glDisable(GL_LIGHTING)
shader = self.world.activate_shader('line')
solid = distance < self.parent.orbit_opaque
glColor4f(1, 1, 1, 1 if solid else (1 - (distance - self.parent.orbit_opaque) / self.parent.orbit_blend))
alpha = 1 if solid else (1 - (distance - self.parent.orbit_opaque) / self.parent.orbit_blend)
shader.uniform_vec4('u_color', 1, 1, 1, alpha)
shader.uniform_mat4('u_mvpMatrix', self.world.projection_matrix() * self.parent.orbit_matrix)
if not solid:
glEnable(GL_BLEND)
glLineWidth(1)
self.get_orbit().draw()
orbit = self.get_orbit()
glBindBuffer(GL_ARRAY_BUFFER, orbit.vbo)
shader.vertex_attribute('a_position', orbit.position_size, orbit.type, GL_FALSE,
orbit.stride, orbit.position_offset)
glDrawArrays(GL_LINE_LOOP, 0, orbit.vertex_count)
shader.deactivate_attributes()
glBindBuffer(GL_ARRAY_BUFFER, 0)
if not solid:
glDisable(GL_BLEND)
self.world.activate_shader(None)
def draw(self, options):
self._draw(options)

14
punyverse/glgeom.py
View file

@ -251,6 +251,12 @@ class Cube(object):
class OrbitVBO(object):
type = GL_FLOAT
stride = 3 * 4
position_offset = 0
position_size = 3
vertex_count = 360
def __init__(self, orbit):
buffer = 360 * 3 * [0]
for theta in range(360):
@ -259,14 +265,6 @@ class OrbitVBO(object):
self.vbo = array_to_gl_buffer(buffer)
def draw(self):
with glRestoreClient(GL_CLIENT_VERTEX_ARRAY_BIT):
glBindBuffer(GL_ARRAY_BUFFER, self.vbo)
glEnableClientState(GL_VERTEX_ARRAY)
glVertexPointer(3, GL_FLOAT, 12, 0)
glDrawArrays(GL_LINE_LOOP, 0, 360)
glBindBuffer(GL_ARRAY_BUFFER, 0)
def close(self):
if self.vbo is not None:
vbo = c_uint(self.vbo)

4
punyverse/shaders/line.vertex.glsl
View file

@ -1,8 +1,8 @@
#version 130
in vec2 a_position;
in vec3 a_position;
uniform mat4 u_mvpMatrix;
void main() {
gl_Position = u_mvpMatrix * vec4(a_position, 0, 1);
gl_Position = u_mvpMatrix * vec4(a_position, 1);
}