this shader works
//VERTconst int NUM_LIGHTS = 2;uniform vec3 LightPosition[NUM_LIGHTS];uniform mat4 CameraViewMatrix; varying vec2 texCoord;varying vec3 vertPos;varying vec3 lightPos[NUM_LIGHTS];void main(void){ texCoord = gl_MultiTexCoord0.xy; lightPos[0] = (vec4(LightPosition[0],1.0f) * CameraViewMatrix).xyz; lightPos[1] = (vec4(LightPosition[1],1.0f) * CameraViewMatrix).xyz; gl_Position = ftransform(); vertPos = (gl_Vertex* gl_ModelViewMatrix).xyz;}//FRAGconst int NUM_LIGHTS = 2;uniform sampler2D diffuseTex;uniform vec4 LightColor[NUM_LIGHTS];uniform float LightRadius[NUM_LIGHTS];varying vec2 texCoord;varying vec3 vertPos;varying vec3 lightPos[NUM_LIGHTS];void main(void){ vec4 diffuseColor = texture2D(diffuseTex, texCoord); vec4 colorAcum = vec4(0.0f, 0.0f, 0.0f, 1.0f); float percentLit; //light 1 percentLit = 1.0f - (distance(lightPos[0], vertPos) / LightRadius[0]); if ( percentLit < 0.0f ) percentLit = 0.0f; colorAcum += (vec4(percentLit,percentLit,percentLit,1.0f) * LightColor[0]); //light 2 percentLit = 1.0f - (distance(lightPos[1], vertPos) / LightRadius[1]); if ( percentLit < 0.0f ) percentLit = 0.0f; colorAcum += (vec4(percentLit,percentLit,percentLit,1.0f) * LightColor[1]); if ( colorAcum.r < 0.3f && colorAcum.g < 0.3f && colorAcum.b < 0.3f ) colorAcum = vec4(0.3f, 0.3f, 0.3f, 1.0f); gl_FragColor = diffuseColor * colorAcum;}While this one doesn't
//VERTconst int NUM_LIGHTS = 2;uniform vec3 LightPosition[NUM_LIGHTS];uniform mat4 CameraViewMatrix; varying vec2 texCoord;varying vec3 vertPos;varying vec3 lightPos[NUM_LIGHTS];void main(void){ texCoord = gl_MultiTexCoord0.xy; for ( int i = 0; i < NUM_LIGHTS; i++ ) { lightPos = (vec4(LightPosition,1.0f) * CameraViewMatrix).xyz; } gl_Position = ftransform(); vertPos = (gl_Vertex* gl_ModelViewMatrix).xyz;}//FRAGconst int NUM_LIGHTS = 2;uniform sampler2D diffuseTex;uniform vec4 LightColor[NUM_LIGHTS];uniform float LightRadius[NUM_LIGHTS];varying vec2 texCoord;varying vec3 vertPos;varying vec3 lightPos[NUM_LIGHTS];void main(void){ vec4 diffuseColor = texture2D(diffuseTex, texCoord); vec4 colorAcum = vec4(0.0f, 0.0f, 0.0f, 1.0f); float percentLit; for ( int i = 0; i < NUM_LIGHTS; i++ ) { percentLit = 1.0f - (distance(lightPos, vertPos) / LightRadius); if ( percentLit < 0.0f ) percentLit = 0.0f; colorAcum += (vec4(percentLit,percentLit,percentLit,1.0f) * LightColor); } if ( colorAcum.r > 1.0f ) colorAcum.r = 1.0f; if ( colorAcum.g > 1.0f ) colorAcum.g = 1.0f; if ( colorAcum.b > 1.0f ) colorAcum.b = 1.0f; if ( colorAcum.a > 1.0f ) colorAcum.a = 1.0f; if ( colorAcum.r < 0.3f && colorAcum.g < 0.3f && colorAcum.b < 0.3f ) colorAcum = vec4(0.3f, 0.3f, 0.3f, 1.0f); gl_FragColor = diffuseColor * colorAcum;}And yet the second one compiles fine in render monkey
