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About SradKiller

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  1. Hello guys. I'm studying GLSL and had a question to apply more than one program. Example, i have 2 GLSL: Texture (Code 1): Vertex: varying vec2 coord; void main(void) { coord = gl_Vertex.xy; gl_Position = ftransform(); //gl_ProjectionMatrix * (gl_ModelViewMatrix * gl_Vertex); } Frag: uniform sampler2D text1; varying vec2 coord; void main(void) { vec4 color = texture2D(text1, coord); gl_FragColor = color; } And i have the GLSL to light (Code 2): Vertex: varying vec3 normal; varying vec4 pos; varying vec4 rawpos; void main() { normal = gl_NormalMatrix * gl_Normal; gl_Position = ftransform(); pos = gl_ModelViewMatrix * gl_Vertex; rawpos = gl_Vertex; gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0; } Frag: varying vec3 normal; varying vec4 pos; void main() { vec4 color = vec4(1,0,0,1); vec4 matspec = vec4(1,1,0,1); float shininess = 512; vec4 lightspec = vec4(10,10,10,10); vec4 lpos = vec4(1,-5,9,1); vec4 s = -normalize(-lpos); vec3 light =; vec3 n = normalize(normal); vec3 r = -reflect(light, n); r = normalize(r); vec3 v =; v = normalize(v); vec4 diffuse = color * max(0.0, dot(n, * color; vec4 specular; if (shininess != 0.0) { specular = lightspec * matspec * pow(max(0.0, dot(r, v)), shininess); } else { specular = vec4(0.0, 0.0, 0.0, 0.0); } gl_FragColor = diffuse + specular; } All work correctly. But when I try to apply both, only the last one is applied to the scene. I wanted to know how I can put the two together without having to do just one file (.Frag and .Vert). Because I would like to leave the lights more dynamic, for example (pseudocode): //ApplyLight uses the program GLSL to Light (Vide code 2) //applyLight(PositionX, PositionY, PositionZ, Atenuation); applyLight(1.0f, 2.0f, 0.0f, 4.0f); applyLight(3.6f, 4.5f, 2.0f, 5.0f); applyLight(2.0f, 1.0f, 1.1f, 3.6f); applyLight(0.0f, 2.0f, 4.0f, 4.5f); //Draw Terrain use the Code 1 and draw a .obj file drawTerrain(); How could I do that? Apply more than one program to an object / scene. Could someone explain me? Regardless of language, I'm using both android ES and C ++.   Thank you