From 148fffb0f23fa437c67639ff3cc69177fb71d76a Mon Sep 17 00:00:00 2001 From: Loic Blot Date: Thu, 15 Jan 2015 23:11:56 +1000 Subject: Optimize bumpmapping mathematics OpenGL_vertex: * bufferize a duplicate calcul * Factorize vertexes --- client/shaders/nodes_shader/opengl_fragment.glsl | 7 +++++- client/shaders/nodes_shader/opengl_vertex.glsl | 31 ++++++++++++++++++------ 2 files changed, 30 insertions(+), 8 deletions(-) (limited to 'client/shaders/nodes_shader') diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl index 2a1cbc568..7ef30cc52 100644 --- a/client/shaders/nodes_shader/opengl_fragment.glsl +++ b/client/shaders/nodes_shader/opengl_fragment.glsl @@ -87,7 +87,12 @@ vec4 base = texture2D(baseTexture, uv).rgba; vec3 E = normalize(eyeVec); float specular = pow(clamp(dot(reflect(L, bump.xyz), E), 0.0, 1.0),0.5); float diffuse = dot(E,bump.xyz); - color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb; + /* Mathematic optimization + * Original: color = 0.05*base.rgb + diffuse*base.rgb + 0.2*specular*base.rgb; + * This optimization save 2 multiplications (orig: 4 multiplications + 3 additions + * end: 2 multiplications + 3 additions) + */ + color = (0.05 + diffuse + 0.2 * specular) * base.rgb } else { color = base.rgb; } diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl index ff310cc2f..07684f616 100644 --- a/client/shaders/nodes_shader/opengl_vertex.glsl +++ b/client/shaders/nodes_shader/opengl_vertex.glsl @@ -35,22 +35,39 @@ void main(void) #if (MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER vec4 pos = gl_Vertex; pos.y -= 2.0; - pos.y -= sin (pos.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) * WATER_WAVE_HEIGHT - + sin ((pos.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) / 7.0) * WATER_WAVE_HEIGHT; + + float posYbuf = (pos.z / WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH); + + pos.y -= sin(posYbuf) * WATER_WAVE_HEIGHT + sin(posYbuf / 7.0) * WATER_WAVE_HEIGHT; gl_Position = mWorldViewProj * pos; #elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES vec4 pos = gl_Vertex; vec4 pos2 = mWorld * gl_Vertex; - pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2.x * 0.01 + pos2.z * 0.01) * 2.0 - 1.0) * 0.4; - pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.2; - pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.4; + + /* + * Mathematic optimization: pos2.x * A + pos2.z * A (2 multiplications + 1 addition) + * replaced with: (pos2.x + pos2.z) * A (1 addition + 1 multiplication) + * And bufferize calcul to a float + */ + float pos2XpZ = pos2.x + pos2.z; + + pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2XpZ * 0.01) * 2.0 - 1.0) * 0.4; + pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2XpZ * -0.01) * 2.0 - 1.0) * 0.2; + pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2XpZ * -0.01) * 2.0 - 1.0) * 0.4; gl_Position = mWorldViewProj * pos; #elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS vec4 pos = gl_Vertex; vec4 pos2 = mWorld * gl_Vertex; if (gl_TexCoord[0].y < 0.05) { - pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2.x * 0.1 + pos2.z * 0.1) * 2.0 - 1.0) * 0.8; - pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2.x * -0.5 + pos2.z * -0.5) * 2.0 - 1.0) * 0.4; + /* + * Mathematic optimization: pos2.x * A + pos2.z * A (2 multiplications + 1 addition) + * replaced with: (pos2.x + pos2.z) * A (1 addition + 1 multiplication) + * And bufferize calcul to a float + */ + float pos2XpZ = pos2.x + pos2.z; + + pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2XpZ * 0.1) * 2.0 - 1.0) * 0.8; + pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2XpZ * -0.5) * 2.0 - 1.0) * 0.4; } gl_Position = mWorldViewProj * pos; #else -- cgit v1.2.3