Question

I try to send values to the GLSL, int is just all right, but float comes out strange.

Ubuntu 10.04LTS

Graphics card: G105M

Here is my vertex shader:

#version 110

attribute vec4 a_vertex;
attribute vec3 a_texCoord;

varying vec2 v_texCoord;

uniform float u_time;

void main()
{
    gl_Position=vec4(a_vertex.x+u_time,a_vertex.y,a_vertex.z,1);
    v_texCoord=a_texCoord.xy;
}

Here is my c code:

GLint timeLoc=glGetUniformLocation(splash_screen.proHandle,"u_time");
glUniform1f(timeLoc,1.0);

Here is the strange thing: if I change the u_time to int type, it works all right. But if I go with a float it is very strange.

if I use int,the vertex x will +1,but if i use float the vertex x not change.

I think i found it.

I port my program to Android,it work well.

It’s my computer’s problem(90% is the graphic card driver)

Answer 1

I finall found it.

I port my program to android,it work well

It’s my computer’s problem(90% is the graphic card driver)