43 lines
919 B
GLSL
43 lines
919 B
GLSL
#ifdef GL_ES
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// Set default precision to medium
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precision mediump int;
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precision mediump float;
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#endif
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uniform mat4 m_matrix;
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uniform mat4 mv_matrix;
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uniform mat4 mvp_matrix;
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attribute vec3 a_position;
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attribute vec3 a_normal;
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attribute vec2 a_texcoord;
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attribute vec3 a_tangent;
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varying vec3 v_WorldPos;
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varying vec3 v_CamPos;
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varying vec3 v_normal;
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varying vec2 v_texcoord;
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varying mat3 normalMat;
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void main() {
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// interpolation:
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v_WorldPos = vec3(m_matrix * vec4(a_position, 1.0));
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v_CamPos = vec3(mv_matrix * vec4(a_position, 1.0));
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v_normal = a_normal;//normalize(vec3(mv_matrix * vec4(a_normal, 0.0)));
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v_texcoord = a_texcoord;
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// http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-13-normal-mapping/
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vec3 bitangent = cross(a_normal, a_tangent);
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normalMat = mat3(a_tangent, bitangent, a_normal);
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// 2D position for the vertex
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gl_Position = mvp_matrix * vec4(a_position, 1.0);
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}
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