Shaders don't use blockID anymore. Fixes #48.

client/source/gui/InventoryCube.cpp

@@ -91,22 +91,21 @@ void InventoryCube::updateVertexBuffer(const Block &block) {
 			blockTexCoords.x + blockTexCoords.width, blockTexCoords.y,
 			blockTexCoords.x,                        blockTexCoords.y
 		};
-		for(u8 j = 0 ; j < 4 ; j++) {
-			vertices[j + i * 4].texCoord[0] = faceTexCoords[j * 2];
-			vertices[j + i * 4].texCoord[1] = faceTexCoords[j * 2 + 1];
 
+		for(u8 j = 0 ; j < 4 ; j++) {
 			vertices[j + i * 4].coord3d[0] = vertices[j + i * 4].coord3d[0] * block.boundingBox().width  + block.boundingBox().x;
 			vertices[j + i * 4].coord3d[1] = vertices[j + i * 4].coord3d[1] * block.boundingBox().height + block.boundingBox().y;
 			vertices[j + i * 4].coord3d[2] = vertices[j + i * 4].coord3d[2] * block.boundingBox().depth  + block.boundingBox().z;
-		}
-	}
 
-	gk::Color color = gk::Color::White;
-	for (u8 i = 0 ; i < 6 * 4 ; ++i) {
-		vertices[i].color[0] = color.r;
-		vertices[i].color[1] = color.g;
-		vertices[i].color[2] = color.b;
-		vertices[i].color[3] = color.a;
+			vertices[j + i * 4].texCoord[0] = faceTexCoords[j * 2];
+			vertices[j + i * 4].texCoord[1] = faceTexCoords[j * 2 + 1];
+
+			const gk::Color &colorMultiplier = block.colorMultiplier();
+			vertices[j + i * 4].color[0] = colorMultiplier.r;
+			vertices[j + i * 4].color[1] = colorMultiplier.g;
+			vertices[j + i * 4].color[2] = colorMultiplier.b;
+			vertices[j + i * 4].color[3] = colorMultiplier.a;
+		}
 	}
 
 	gk::VertexBuffer::bind(&m_vbo);

client/source/states/GameState.cpp

@@ -150,9 +150,10 @@ void GameState::initShaders() {
 }
 
 void GameState::draw(gk::RenderTarget &target, gk::RenderStates states) const {
-	gk::Shader::bind(&m_shader);
-	m_shader.setUniform("u_time", gk::GameClock::getTicks());
-	gk::Shader::bind(nullptr);
+	// FIXME: This uniform is not used anymore since water/leaves effects are disabled
+	// gk::Shader::bind(&m_shader);
+	// m_shader.setUniform("u_time", gk::GameClock::getTicks());
+	// gk::Shader::bind(nullptr);
 
 	states.shader = &m_shader;
 

client/source/world/ChunkBuilder.cpp

@@ -184,10 +184,11 @@ inline void ChunkBuilder::addFace(u8 x, u8 y, u8 z, u8 i, const ClientChunk &chu
 		vertices[j].normal[1] = normal.y;
 		vertices[j].normal[2] = normal.z;
 
-		vertices[j].color[0] = 1.0;
-		vertices[j].color[1] = 1.0;
-		vertices[j].color[2] = 1.0;
-		vertices[j].color[3] = 1.0;
+		const gk::Color colorMultiplier = block->colorMultiplier();
+		vertices[j].color[0] = colorMultiplier.r;
+		vertices[j].color[1] = colorMultiplier.g;
+		vertices[j].color[2] = colorMultiplier.b;
+		vertices[j].color[3] = colorMultiplier.a;
 
 		vertices[j].texCoord[0] = faceTexCoords[j * 2];
 		vertices[j].texCoord[1] = faceTexCoords[j * 2 + 1];
@@ -206,8 +207,6 @@ inline void ChunkBuilder::addFace(u8 x, u8 y, u8 z, u8 i, const ClientChunk &chu
 				surroundingBlockPos[0], surroundingBlockPos[1], surroundingBlockPos[2]);
 
 		vertices[j].ambientOcclusion = getAmbientOcclusion(x, y, z, i, j, chunk);
-
-		vertices[j].blockType = block->id();
 	}
 
 	auto addVertex = [&](u8 j) {
@@ -262,10 +261,11 @@ inline void ChunkBuilder::addCross(u8 x, u8 y, u8 z, const ClientChunk &chunk, c
 			vertices[j].normal[1] = normal.y;
 			vertices[j].normal[2] = normal.z;
 
-			vertices[j].color[0] = 1.0;
-			vertices[j].color[1] = 1.0;
-			vertices[j].color[2] = 1.0;
-			vertices[j].color[3] = 1.0;
+			const gk::Color colorMultiplier = block->colorMultiplier();
+			vertices[j].color[0] = colorMultiplier.r;
+			vertices[j].color[1] = colorMultiplier.g;
+			vertices[j].color[2] = colorMultiplier.b;
+			vertices[j].color[3] = colorMultiplier.a;
 
 			vertices[j].texCoord[0] = faceTexCoords[j * 2];
 			vertices[j].texCoord[1] = faceTexCoords[j * 2 + 1];
@@ -274,8 +274,6 @@ inline void ChunkBuilder::addCross(u8 x, u8 y, u8 z, const ClientChunk &chunk, c
 			vertices[j].lightValue[1] = chunk.lightmap().getTorchlight(x, y, z);
 
 			vertices[j].ambientOcclusion = 5;
-
-			vertices[j].blockType = block->id();
 		}
 
 		m_vertices[Layer::Flora].emplace_back(vertices[0]);

common/include/world/Block.hpp

@@ -29,6 +29,7 @@
 
 #include <gk/core/Box.hpp>
 #include <gk/core/IntTypes.hpp>
+#include <gk/graphics/Color.hpp>
 
 #include "ItemStack.hpp"
 #include "ISerializable.hpp"
@@ -93,6 +94,9 @@ class Block : public ISerializable {
 		bool isLightSource() const { return m_isLightSource; }
 		void setLightSource(bool isLightSource) { m_isLightSource = isLightSource; }
 
+		const gk::Color &colorMultiplier() const { return m_colorMultiplier; }
+		void setColorMultiplier(const gk::Color &colorMultiplier) { m_colorMultiplier = colorMultiplier; }
+
 	protected:
 		glm::vec4 getTexCoordsFromID(int textureID) const;
 
@@ -119,6 +123,8 @@ class Block : public ISerializable {
 		bool m_isOpaque = true;
 
 		bool m_isLightSource = false;
+
+		gk::Color m_colorMultiplier = gk::Color::White;
 };
 
 #endif // BLOCK_HPP_

common/source/world/Block.cpp

@@ -44,7 +44,8 @@ void Block::serialize(sf::Packet &packet) const {
 		<< m_hardness << m_harvestRequirements << m_itemDrop << m_itemDropAmount << m_tiles
 		<< m_boundingBox.x << m_boundingBox.y << m_boundingBox.z
 		<< m_boundingBox.width << m_boundingBox.height << m_boundingBox.depth
-		<< m_isLightSource << m_canUpdate << m_canBeActivated;
+		<< m_isLightSource << m_canUpdate << m_canBeActivated
+		<< m_colorMultiplier.r << m_colorMultiplier.g << m_colorMultiplier.b << m_colorMultiplier.a;
 }
 
 void Block::deserialize(sf::Packet &packet) {
@@ -55,7 +56,8 @@ void Block::deserialize(sf::Packet &packet) {
 		>> m_harvestRequirements >> m_itemDrop >> m_itemDropAmount >> m_tiles
 		>> m_boundingBox.x >> m_boundingBox.y >> m_boundingBox.z
 		>> m_boundingBox.width >> m_boundingBox.height >> m_boundingBox.depth
-		>> m_isLightSource >> m_canUpdate >> m_canBeActivated;
+		>> m_isLightSource >> m_canUpdate >> m_canBeActivated
+		>> m_colorMultiplier.r >> m_colorMultiplier.g >> m_colorMultiplier.b >> m_colorMultiplier.a;
 
 	m_id = id;
 	m_drawType = BlockDrawType(drawType);

mods/default/blocks.lua

@@ -39,6 +39,8 @@ mod:block {
 	id = "grass",
 	name = "Grass",
 	tiles = {"grass_block_top.png", "dirt.png", "grass_block_side.png"},
+	color_multiplier = {129, 191, 91, 255},
+
 	item_drop = {
 		id = mod:id()..":dirt",
 		amount = 1
@@ -49,6 +51,7 @@ mod:block {
 	id = "leaves",
 	name = "Leaves",
 	tiles = "oak_leaves.png",
+	color_multiplier = {106, 173, 51, 255},
 	hardness = 0.5,
 	draw_type = 2, -- FIXME: Use string instead
 	-- is_opaque = false, -- FIXME
@@ -83,6 +86,7 @@ mod:block {
 	id = "water",
 	name = "Water",
 	tiles = "water.png",
+	color_multiplier = {51, 115, 255, 217},
 	draw_type = 3, -- FIXME: Use string instead
 	is_opaque = false,
 }

resources/shaders/basic.f.glsl

@@ -1,7 +1,8 @@
 #version 120
 
-varying vec4 v_color;
+varying vec4 v_coord3d;
 varying vec2 v_texCoord;
+varying vec4 v_color;
 varying float v_faceValue;
 
 uniform sampler2D u_tex;
@@ -12,8 +13,11 @@ void main() {
 	vec4 color = v_color;
 
 	if (v_texCoord.x != -1 && v_texCoord.y != -1) {
-		vec4 texColor = texture2D(u_tex, v_texCoord);
-		color = vec4(texColor.rgb - (1 - color.rgb), min(texColor.a, color.a));
+		color = texture2D(u_tex, v_texCoord);
+
+		if (color.r == color.g && color.g == color.b) {
+			color *= v_color;
+		}
 	}
 
 	// if (u_renderType == -1) {

resources/shaders/basic.v.glsl

@@ -1,12 +1,12 @@
 #version 120
 
-attribute vec4 color;
 attribute vec4 coord3d;
 attribute vec2 texCoord;
+attribute vec4 color;
 
-varying vec4 v_color;
 varying vec4 v_coord3d;
 varying vec2 v_texCoord;
+varying vec4 v_color;
 varying float v_faceValue;
 
 uniform mat4 u_modelMatrix;

resources/shaders/color.f.glsl

@@ -3,18 +3,12 @@
 varying vec4 v_color;
 varying vec2 v_texCoord;
 
-varying float v_blockID;
-
 uniform sampler2D u_tex;
 
 vec4 getColor() {
-	vec4 color = v_color;
-
-	// if(color == vec4(0, 0, 0, 1)) {
 	if (v_texCoord.x != -1 && v_texCoord.y != -1) {
-		vec4 texColor = texture2D(u_tex, v_texCoord);
-		color = vec4(texColor.rgb - (1 - color.rgb), min(texColor.a, color.a));
+		return texture2D(u_tex, v_texCoord);
 	}
 
-	return color;
+	return v_color;
 }

resources/shaders/game.f.glsl

@@ -1,11 +1,11 @@
 #version 120
 
 varying vec4 v_coord3d;
+varying vec4 v_color;
 varying vec2 v_lightValue;
 varying float v_ambientOcclusion;
 
 varying float v_blockFace;
-varying float v_blockID;
 varying float v_dist;
 
 uniform int u_renderDistance;
@@ -22,32 +22,20 @@ vec4 fog(vec4 color, float fogCoord, float fogStart, float fogEnd);
 void main() {
 	// Needed to prevent bad interpolation on some systems
 	// Refer to #23 for more informations
-	float blockID = floor(v_blockID + 0.5);
 	float blockFace = floor(v_blockFace + 0.5);
 	float lightCheck = floor(v_lightValue.x + 0.5);
 
 	// Discard if the pixel is too far away
-	if(blockID != -1. && v_dist > u_renderDistance) discard;
+	if(v_blockFace != -1. && v_dist > u_renderDistance) discard;
 
+	// Get current pixel color and apply multiplier on grayscale textures
 	vec4 color = getColor();
-	if (blockID == 8.) { // Water
-		color.a = 0.85;
-		color += vec4(-0.8, -0.4, 0.2, 0);
-	}
-	else if (blockID == 4.) { // Leaves
-		color += vec4(-0.5, -0.15, -0.4, 0);
-		/* if (v_dist > 20 && color.a == 0) */
-		/* 	color.a = 0.5; */
-	}
-	else if (blockID == 3.) { // Grass
-		if (color.r == color.g && color.r == color.b) {
-			color += vec4(-0.3, -0.1, -0.25, 0);
-			/* color += vec4(-0.4, -0.15, -0.3, 0); */
-		}
+	if (v_blockFace != -1 && color != v_color && color.r == color.g && color.g == color.b) {
+		color *= v_color;
 	}
 
 	// Very cheap "transparency": don't draw pixels with a low alpha value
-	if(color.a < 0.3 && blockID != -1.) discard;
+	if(color.a < 0.3 && v_blockFace != -1.) discard;
 
 	// FIXME: FINISH THIS WITH PROPER CODE AND SUN BASIC DISPLAY
 	// int maxTime = 5 * 1000;

resources/shaders/game.v.glsl

@@ -5,43 +5,44 @@ attribute vec4 coord3d;
 attribute vec3 normal;
 attribute vec2 texCoord;
 attribute vec2 lightValue;
-attribute float blockType;
 attribute float ambientOcclusion;
 
-varying vec4 v_color;
 varying vec4 v_coord3d;
+varying vec4 v_color;
 varying vec4 v_normal;
 varying vec2 v_texCoord;
 varying vec2 v_lightValue;
 varying float v_ambientOcclusion;
 
 varying float v_blockFace;
-varying float v_blockID;
 varying float v_dist;
 
 uniform mat4 u_modelMatrix;
 uniform mat4 u_projectionMatrix;
 uniform mat4 u_viewMatrix;
 
 uniform int u_renderDistance;
-uniform int u_time;
+// uniform int u_time;
 
 void main() {
-	vec3 finalPos = coord3d.xyz;
-	if (blockType == 8) { // Water
-		// finalPos.y += sin((u_time / 1000.0 + mod(finalPos.x, 16)) * 1.75) / 10.0;
-		// finalPos.y += cos((u_time / 1000.0 + mod(finalPos.z, 16)) * 1.75) / 10.0;
-		// finalPos.y -= 0.25;
-		// finalPos.y -= 1.0 / 16.0;
-		finalPos.y += sin(u_time / 1000.0) / 16.0 - 0.125;
-	}
-	else if (blockType == 4) { // Leaves
-		finalPos.xz += sin((u_time / 1000.0 + finalPos.x) * 2) / 30.0;
-		finalPos.xz += cos((u_time / 1000.0 + finalPos.z) * 2) / 30.0;
-	}
+	// FIXME: This code won't work anymore because of 'blockType' attibute removal
+	//        One way to get those effects back would be to add another attribute 'effect'
+	//        with values: 'NONE', 'LIQUID', 'LEAVES'
+	// vec3 finalPos = coord3d.xyz;
+	// if (blockType == 8) { // Water
+	// 	// finalPos.y += sin((u_time / 1000.0 + mod(finalPos.x, 16)) * 1.75) / 10.0;
+	// 	// finalPos.y += cos((u_time / 1000.0 + mod(finalPos.z, 16)) * 1.75) / 10.0;
+	// 	// finalPos.y -= 0.25;
+	// 	// finalPos.y -= 1.0 / 16.0;
+	// 	finalPos.y += sin(u_time / 1000.0) / 16.0 - 0.125;
+	// }
+	// else if (blockType == 4) { // Leaves
+	// 	finalPos.xz += sin((u_time / 1000.0 + finalPos.x) * 2) / 30.0;
+	// 	finalPos.xz += cos((u_time / 1000.0 + finalPos.z) * 2) / 30.0;
+	// }
 
 	// Used for lighting
-	v_coord3d = u_modelMatrix * vec4(finalPos, 1.0);
+	v_coord3d = u_modelMatrix * vec4(coord3d.xyz, 1.0);
 	v_normal = vec4(normal, 1.0);
 
 	v_color = color;
@@ -56,7 +57,6 @@ void main() {
 	}
 
 	v_blockFace = coord3d.w;
-	v_blockID = blockType;
 
 	// Distance from eye
 	v_dist = length(u_viewMatrix * v_coord3d);

server/source/lua/LuaMod.cpp

@@ -71,6 +71,16 @@ void LuaMod::registerBlock(const sol::table &table) {
 		block.setItemDrop(dropID, dropAmount);
 	}
 
+	sol::optional<sol::table> colorMultiplier = table["color_multiplier"];
+	if (colorMultiplier != sol::nullopt) {
+		block.setColorMultiplier(gk::Color{
+			colorMultiplier.value().get<u8>(1),
+			colorMultiplier.value().get<u8>(2),
+			colorMultiplier.value().get<u8>(3),
+			colorMultiplier.value().get<u8>(4)
+		});
+	}
+
 	Registry::getInstance().registerItem(block.tiles(), stringID, label).setIsBlock(true);
 }