Hardware instancing, shaders and GLSL

Scripting Issues
21

You must be mistaken, I just checked myself and there are quite a lot more than two lines different. What program are you using to merge them?

22

I used meld to check things out, and with only problem is that there is different switch, but I think that is related to the newer version of panda?

23

There should be a block of code you need around line 300. Basically what has been added is a condition that checks if the length of the input is 1 and runs the existing code, otherwise there is a new block of code that will run for an array (input length more than 1).

24

Unfortunatelly, it will end with:

Vertex shader was successfully compiled to run on hardware.

Ener call array
array vec4
Ener call array
array vec4
:display:gsg:glgsg(error): z_Position: parameter type supported only in Cg

Here is the code:

import tests
import os
import math
import time
import warnings

from pandac.PandaModules import ConfigVariableBool
shandle = ConfigVariableBool('basic-shaders-only', False)
shandle.setValue(True)

import direct.directbase.DirectStart

from pandac.PandaModules import *
from panda3d.core import *
from direct.actor.Actor import Actor

INST_NUM = 0
MODEL = os.path.abspath("../models/mod.egg")
TEXTURE = os.path.abspath("../textures/text.png")
SHA_V = "../shaders/inst-sha-v.sha"
SHA_F = "../shaders/inst-sha-f.sha"
SHA_NVIDIA = "../shaders/instance-shader.cg"

position = PTAVecBase4.emptyArray(INST_NUM+1)
rotation = PTAFloat.emptyArray(INST_NUM+1)

warnings.warn("Test if number of spawned creeps is correct before release!", FutureWarning)

for x in xrange(0, INST_NUM+1):
	position[x] = Vec4(x*10.0, x*10.0, 0.0, 0.0)
	rotation[x] = float(math.radians(45))



model = Actor(MODEL)
model.setTexture(loader.loadTexture(TEXTURE))
model.setScale(5.0, 5.0, 5.0)
model.loop("idle01")
model.reparentTo(render)

#shader = Shader.load(SHA_NVIDIA)
shader = Shader.load(Shader.SLGLSL, SHA_V, SHA_F)

#model.setShaderInput("offsets", position)
model.setShaderInput("z_Position", position)
model.setShaderInput("z_Rotation", rotation)
model.setShader(shader)

model.setInstanceCount(INST_NUM+1)

run()

Shaders:

//GLSL
uniform vec4 z_Position[128];
uniform float z_Rotation[128];

void main(void)
{
  
  mat4 z_RotationMatrixZ = mat4 (cos( z_Rotation[gl_InstanceID] ),  sin( z_Rotation[gl_InstanceID] ), 0.0, 0.0,
  								-sin( z_Rotation[gl_InstanceID] ),  cos( z_Rotation[gl_InstanceID] ), 0.0, 0.0,
  								0.0, 0.0, 1.0, 0.0,
  								0.0,  0.0, 0.0, 1.0); 						
  								
  gl_Position = gl_ProjectionMatrix * ( z_Position[gl_InstanceID] + ( gl_ModelViewMatrix * ( z_RotationMatrixZ * gl_Vertex)));

}
//GLSL

uniform sampler2D tex_0;

void main(void) 
{

  gl_FragColor = texture(tex_0, vec2(gl_TexCoord[0]));

}

Here is my glShaderContext_src.cxx:

http://paste.pocoo.org/show/447125/