function createVertexShader() {
var vertexShaderSource = [
'attribute vec3 pos;',
'attribute vec3 fillColor;',
'attribute float fillOpacity;',
'uniform mat4 modelViewMatrix;',
'uniform mat4 projectionMatrix;',
'uniform float pixelWidth;',
'varying vec3 fillColorVar;',
'varying float fillOpacityVar;',
'void main(void)',
'{',
' vec4 clipPos = projectionMatrix * modelViewMatrix * vec4(pos.xyz, 1);',
' if (clipPos.w != 0.0) {',
' clipPos = clipPos/clipPos.w;',
' }',
' fillColorVar = fillColor;',
' fillOpacityVar = fillOpacity;',
' gl_Position = clipPos;',
'}'
].join('\n'),
shader = new vgl.shader(vgl.GL.VERTEX_SHADER);
shader.setShaderSource(vertexShaderSource);
return shader;
}
function createVertexShader() {
var vertexShaderSource = [
'#ifdef GL_ES',
' precision highp float;',
'#endif',
'attribute vec3 pos;',
'attribute float value;',
'attribute float opacity;',
'uniform mat4 modelViewMatrix;',
'uniform mat4 projectionMatrix;',
'varying float valueVar;',
'varying float opacityVar;',
'void main(void)',
'{',
/* Don't use z values; something is rotten in one of our matrices */
' vec4 scrPos = projectionMatrix * modelViewMatrix * vec4(pos.xy, 0, 1);',
' if (scrPos.w != 0.0) {',
' scrPos = scrPos / scrPos.w;',
' }',
' valueVar = value;',
' opacityVar = opacity;',
' gl_Position = scrPos;',
'}'
].join('\n'),
shader = new vgl.shader(vgl.GL.VERTEX_SHADER);
shader.setShaderSource(vertexShaderSource);
return shader;
}
function createFragmentShader() {
var fragmentShaderSource = [
'#ifdef GL_ES',
' precision highp float;',
'#endif',
'varying vec4 fillColorVar;',
'void main () {',
' gl_FragColor = fillColorVar;',
'}'
].join('\n'),
shader = new vgl.shader(vgl.GL.FRAGMENT_SHADER);
shader.setShaderSource(fragmentShaderSource);
return shader;
}
function createFragmentShader() {
var fragmentShaderSource = [
'#ifdef GL_ES',
' precision highp float;',
'#endif',
'uniform vec4 minColor;',
'uniform vec4 maxColor;',
'uniform float steps;',
'uniform bool stepped;',
'uniform sampler2D sampler2d;',
'varying float valueVar;',
'varying float opacityVar;',
'void main () {',
' vec4 clr;',
' if (valueVar < 0.0) {',
' clr = minColor;',
' } else if (valueVar > steps) {',
' clr = maxColor;',
' } else {',
' float step;',
' if (stepped) {',
' step = floor(valueVar) + 0.5;',
' if (step > steps) {',
' step = steps - 0.5;',
' }',
' } else {',
' step = valueVar;',
' }',
' clr = texture2D(sampler2d, vec2(step / steps, 0.0));',
' }',
' gl_FragColor = vec4(clr.rgb, clr.a * opacityVar);',
'}'
].join('\n'),
shader = new vgl.shader(vgl.GL.FRAGMENT_SHADER);
shader.setShaderSource(fragmentShaderSource);
return shader;
}
function createFragmentShader() {
var shader = new vgl.shader(vgl.GL.FRAGMENT_SHADER);
shader.setShaderSource(fragmentShaderSource);
return shader;
}
function createVertexShader() {
var shader = new vgl.shader(vgl.GL.VERTEX_SHADER);
shader.setShaderSource(vertexShaderSource);
return shader;
}